Interactions between Ivacaftor and Mefenamic acid

Mefenamic acid has a major potential interaction with Alcoholism.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a moderate potential interaction with Anemia.

Anemia has been reported in patients treated with nonsteroidal anti-inflammatory drugs (NSAIDs). This may be due to fluid retention, occult/gross blood loss, or an incompletely described effect on erythropoiesis. Hemoglobin or hematocrit should be monitored in patients with any signs/symptoms of anemia or blood loss, especially during long-term therapy. NSAIDs may increase risk of bleeding events; comorbid conditions (e.g., coagulation disorders; concomitant use of warfarin/other anticoagulants, antiplatelet agents, serotonin/serotonin norepinephrine reuptake inhibitors) may increase this risk, and patients with these conditions should be monitored for signs of bleeding. Therapy with NSAIDs should be administered cautiously in patients with or predisposed to anemia. Clinical monitoring of hematopoietic function may be appropriate, particularly during chronic therapy.

Mefenamic acid has a major potential interaction with Asthma.

Nonsteroidal anti-inflammatory drugs (NSAIDs) are contraindicated in patients with history of asthma, urticaria, or other allergic-type reactions after taking aspirin or other NSAIDs; severe, sometimes fatal, anaphylactic reactions to NSAIDs have been reported in such patients. A subpopulation of patients with asthma may have aspirin-sensitive asthma which may include chronic rhinosinusitis complicated by nasal polyps, severe potentially fatal bronchospasm, and/or intolerance to aspirin and other NSAIDs. Since cross-reactivity between aspirin and other NSAIDs has been reported in such aspirin-sensitive patients, therapy with any NSAID should be avoided in patients with this form of aspirin sensitivity. NSAIDs should be used with caution in patients with preexisting asthma (without known aspirin sensitivity), and these patients should be monitored for changes in the signs and symptoms of asthma.

Mefenamic acid has a moderate potential interaction with Bleeding Disorder.

Anemia has been reported in patients treated with nonsteroidal anti-inflammatory drugs (NSAIDs). This may be due to fluid retention, occult/gross blood loss, or an incompletely described effect on erythropoiesis. Hemoglobin or hematocrit should be monitored in patients with any signs/symptoms of anemia or blood loss, especially during long-term therapy. NSAIDs may increase risk of bleeding events; comorbid conditions (e.g., coagulation disorders; concomitant use of warfarin/other anticoagulants, antiplatelet agents, serotonin/serotonin norepinephrine reuptake inhibitors) may increase this risk, and patients with these conditions should be monitored for signs of bleeding. Therapy with NSAIDs should be administered cautiously in patients with or predisposed to anemia. Clinical monitoring of hematopoietic function may be appropriate, particularly during chronic therapy.

Mefenamic acid has a moderate potential interaction with Bleeding Disorder.

Nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly inhibit platelet adhesion and aggregation and may prolong bleeding time in some patients. With the exception of aspirin, the platelet effects seen with most NSAIDs at usual recommended dosages are generally slight and of relatively short duration but may be more pronounced in patients with underlying hemostatic abnormalities. Thrombocytopenia has also been reported rarely during NSAID use. Therapy with NSAIDs should be administered cautiously in patients with significant active bleeding or a hemorrhagic diathesis, including hemostatic and/or coagulation defects associated with hemophilia, vitamin K deficiency, hypoprothrombinemia, thrombocytopenia, thrombocytopathy, or severe hepatic impairment. NSAIDs that selectively inhibit cyclooxygenase-2 (i.e., COX-2 inhibitors) do not appear to affect platelet function or bleeding time at indicated dosages and may be preferable if risk of bleeding is a concern.

Ivacaftor has a moderate potential interaction with Cataract.

Cases of non-congenital lens opacities or cataracts have been reported in pediatric patients treated with products containing ivacaftor. Although other risk factors could be present in some cases (e.g., corticosteroid use or exposure to radiation), a possible risk attributable to this medication cannot be excluded. Baseline and ophthalmological examinations are recommended in pediatric patients initiating treatment

Mefenamic acid has a major potential interaction with Cerebrovascular Insufficiency.

Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. Clinical trials of several cyclooxygenase-2 (COX-2) selective and nonselective NSAIDs of up to 3 years duration have supported this increased risk. It is unclear from available data if the risk for cardiovascular thrombotic events is similar for all NSAIDs. Therapy with NSAIDs should be administered cautiously in patients with a history of cardiovascular or cerebrovascular disease. Patients should be treated with the lowest effective dosage for the shortest duration necessary. Appropriate antiplatelet therapy should be administered to patients requiring cardioprotection; however, there is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious cardiovascular thrombotic events associated with NSAID use, while the risk of serious gastrointestinal events is increased. Physicians and patients should remain alert for the development of adverse cardiovascular events throughout the entire duration of therapy, even without prior cardiovascular symptoms. Patients should be advised to promptly seek medical attention if they experience symptoms of cardiovascular thrombotic events (including chest pain, shortness of breath, weakness, or slurring of speech).

NSAIDs are contraindicated in the setting of coronary artery bypass graft (CABG) surgery. Two large clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10 to 14 days following CABG surgery found an increased incidence of myocardial infarction and stroke.

The use of NSAIDs should be avoided in patients with a recent myocardial infarction unless the benefits are expected to outweigh the risk of recurrent cardiovascular thrombotic events. If an NSAID is used in patients with a recent myocardial infarction, they should be monitored for signs of cardiac ischemia.

Mefenamic acid has a moderate potential interaction with Coagulation Defects and Disorders.

Nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly inhibit platelet adhesion and aggregation and may prolong bleeding time in some patients. With the exception of aspirin, the platelet effects seen with most NSAIDs at usual recommended dosages are generally slight and of relatively short duration but may be more pronounced in patients with underlying hemostatic abnormalities. Thrombocytopenia has also been reported rarely during NSAID use. Therapy with NSAIDs should be administered cautiously in patients with significant active bleeding or a hemorrhagic diathesis, including hemostatic and/or coagulation defects associated with hemophilia, vitamin K deficiency, hypoprothrombinemia, thrombocytopenia, thrombocytopathy, or severe hepatic impairment. NSAIDs that selectively inhibit cyclooxygenase-2 (i.e., COX-2 inhibitors) do not appear to affect platelet function or bleeding time at indicated dosages and may be preferable if risk of bleeding is a concern.

Mefenamic acid has a major potential interaction with Colonic Ulceration.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a major potential interaction with Dehydration.

Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) has resulted in renal papillary necrosis and other renal injury. Renal toxicity has been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion; in such patients, NSAIDs may cause a dose-dependent reduction in prostaglandin synthesis and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk for this reaction include those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction; those taking diuretics, angiotensin-converting enzyme inhibitors, or angiotensin receptor blockers; and older adult patients. Discontinuation of NSAID therapy generally leads to recovery to the pretreatment state. No information is available regarding NSAID use in patients with advanced renal disease; the renal effects of NSAIDs may hasten the progression of renal dysfunction in patients with preexisting renal disease. Volume status should be corrected in dehydrated or hypovolemic patients prior to initiating treatment. Renal function should be monitored in patients with renal or liver dysfunction, heart failure, dehydration, or hypovolemia during therapy. NSAIDs should be avoided in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function; if an NSAID is used in such patients, they should be monitored for signs of worsening renal function.

Mefenamic acid has a major potential interaction with Dermatitis, Drug-Induced.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious skin adverse reactions (e.g., Stevens-Johnson syndrome, toxic epidermal necrolysis, and exfoliative dermatitis), which can be fatal. NSAIDs can also cause fixed drug eruption, and may present as generalized bullous fixed drug eruption, which can be life-threatening. These serious events may occur without warning. Patients should be advised to discontinue the NSAID and seek medical attention promptly at the first sign of skin rash or any other sign of hypersensitivity. NSAIDs are contraindicated in patients with previous serious skin reactions to these drugs.

Mefenamic acid has a major potential interaction with Fluid Retention.

Fluid retention and edema have been reported in association with the use of nonsteroidal anti-inflammatory drugs (NSAIDs), including some topical formulations. NSAIDs (including topicals) can lead to new onset of hypertension or worsening of preexisting hypertension, either of which can contribute to the increased incidence of cardiovascular events. NSAIDs should be used with caution in patients with preexisting fluid retention, hypertension, or history of heart failure. NSAIDs should be avoided in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure; if an NSAID is used in such patients, they should be monitored for signs of worsening heart failure. Blood pressure and cardiovascular status should be monitored closely during the initiation of NSAID treatment and throughout the course of therapy.

Mefenamic acid has a major potential interaction with Gastritis/Duodenitis.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a major potential interaction with Gastrointestinal Hemorrhage.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a major potential interaction with Gastrointestinal Perforation.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a major potential interaction with Heart Failure.

Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) has resulted in renal papillary necrosis and other renal injury. Renal toxicity has been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion; in such patients, NSAIDs may cause a dose-dependent reduction in prostaglandin synthesis and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk for this reaction include those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction; those taking diuretics, angiotensin-converting enzyme inhibitors, or angiotensin receptor blockers; and older adult patients. Discontinuation of NSAID therapy generally leads to recovery to the pretreatment state. No information is available regarding NSAID use in patients with advanced renal disease; the renal effects of NSAIDs may hasten the progression of renal dysfunction in patients with preexisting renal disease. Volume status should be corrected in dehydrated or hypovolemic patients prior to initiating treatment. Renal function should be monitored in patients with renal or liver dysfunction, heart failure, dehydration, or hypovolemia during therapy. NSAIDs should be avoided in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function; if an NSAID is used in such patients, they should be monitored for signs of worsening renal function.

Mefenamic acid has a major potential interaction with Heart Failure.

Fluid retention and edema have been reported in association with the use of nonsteroidal anti-inflammatory drugs (NSAIDs), including some topical formulations. NSAIDs (including topicals) can lead to new onset of hypertension or worsening of preexisting hypertension, either of which can contribute to the increased incidence of cardiovascular events. NSAIDs should be used with caution in patients with preexisting fluid retention, hypertension, or history of heart failure. NSAIDs should be avoided in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure; if an NSAID is used in such patients, they should be monitored for signs of worsening heart failure. Blood pressure and cardiovascular status should be monitored closely during the initiation of NSAID treatment and throughout the course of therapy.

Mefenamic acid has a major potential interaction with High Blood Pressure.

Fluid retention and edema have been reported in association with the use of nonsteroidal anti-inflammatory drugs (NSAIDs), including some topical formulations. NSAIDs (including topicals) can lead to new onset of hypertension or worsening of preexisting hypertension, either of which can contribute to the increased incidence of cardiovascular events. NSAIDs should be used with caution in patients with preexisting fluid retention, hypertension, or history of heart failure. NSAIDs should be avoided in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure; if an NSAID is used in such patients, they should be monitored for signs of worsening heart failure. Blood pressure and cardiovascular status should be monitored closely during the initiation of NSAID treatment and throughout the course of therapy.

Ivacaftor has a moderate potential interaction with High Blood Pressure.

The use of products containing ivacaftor is associated with an increase in blood pressure. Close monitoring of blood pressure is recommended periodically in all patients, in particular in hypertensive patients.

Mefenamic acid has a major potential interaction with History, Peptic Ulcer.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Ivacaftor has a moderate potential interaction with History, Radiation Therapy.

Cases of non-congenital lens opacities or cataracts have been reported in pediatric patients treated with products containing ivacaftor. Although other risk factors could be present in some cases (e.g., corticosteroid use or exposure to radiation), a possible risk attributable to this medication cannot be excluded. Baseline and ophthalmological examinations are recommended in pediatric patients initiating treatment

Mefenamic acid has a major potential interaction with History - Cerebrovascular Disease.

Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. Clinical trials of several cyclooxygenase-2 (COX-2) selective and nonselective NSAIDs of up to 3 years duration have supported this increased risk. It is unclear from available data if the risk for cardiovascular thrombotic events is similar for all NSAIDs. Therapy with NSAIDs should be administered cautiously in patients with a history of cardiovascular or cerebrovascular disease. Patients should be treated with the lowest effective dosage for the shortest duration necessary. Appropriate antiplatelet therapy should be administered to patients requiring cardioprotection; however, there is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious cardiovascular thrombotic events associated with NSAID use, while the risk of serious gastrointestinal events is increased. Physicians and patients should remain alert for the development of adverse cardiovascular events throughout the entire duration of therapy, even without prior cardiovascular symptoms. Patients should be advised to promptly seek medical attention if they experience symptoms of cardiovascular thrombotic events (including chest pain, shortness of breath, weakness, or slurring of speech).

NSAIDs are contraindicated in the setting of coronary artery bypass graft (CABG) surgery. Two large clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10 to 14 days following CABG surgery found an increased incidence of myocardial infarction and stroke.

The use of NSAIDs should be avoided in patients with a recent myocardial infarction unless the benefits are expected to outweigh the risk of recurrent cardiovascular thrombotic events. If an NSAID is used in patients with a recent myocardial infarction, they should be monitored for signs of cardiac ischemia.

Mefenamic acid has a major potential interaction with History - Myocardial Infarction.

Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. Clinical trials of several cyclooxygenase-2 (COX-2) selective and nonselective NSAIDs of up to 3 years duration have supported this increased risk. It is unclear from available data if the risk for cardiovascular thrombotic events is similar for all NSAIDs. Therapy with NSAIDs should be administered cautiously in patients with a history of cardiovascular or cerebrovascular disease. Patients should be treated with the lowest effective dosage for the shortest duration necessary. Appropriate antiplatelet therapy should be administered to patients requiring cardioprotection; however, there is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious cardiovascular thrombotic events associated with NSAID use, while the risk of serious gastrointestinal events is increased. Physicians and patients should remain alert for the development of adverse cardiovascular events throughout the entire duration of therapy, even without prior cardiovascular symptoms. Patients should be advised to promptly seek medical attention if they experience symptoms of cardiovascular thrombotic events (including chest pain, shortness of breath, weakness, or slurring of speech).

NSAIDs are contraindicated in the setting of coronary artery bypass graft (CABG) surgery. Two large clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10 to 14 days following CABG surgery found an increased incidence of myocardial infarction and stroke.

The use of NSAIDs should be avoided in patients with a recent myocardial infarction unless the benefits are expected to outweigh the risk of recurrent cardiovascular thrombotic events. If an NSAID is used in patients with a recent myocardial infarction, they should be monitored for signs of cardiac ischemia.

Mefenamic acid has a moderate potential interaction with Hyperkalemia.

Increases in serum potassium concentration (including hyperkalemia) have been reported with use of nonsteroidal anti-inflammatory drugs (NSAIDs), even in some patients without renal impairment. In patients with normal renal function, these effects have been attributed to a hyporeninemic-hypoaldosteronism state. Caution is advised in patients with hyperkalemia.

Mefenamic acid has a major potential interaction with Hyponatremia.

Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) has resulted in renal papillary necrosis and other renal injury. Renal toxicity has been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion; in such patients, NSAIDs may cause a dose-dependent reduction in prostaglandin synthesis and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk for this reaction include those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction; those taking diuretics, angiotensin-converting enzyme inhibitors, or angiotensin receptor blockers; and older adult patients. Discontinuation of NSAID therapy generally leads to recovery to the pretreatment state. No information is available regarding NSAID use in patients with advanced renal disease; the renal effects of NSAIDs may hasten the progression of renal dysfunction in patients with preexisting renal disease. Volume status should be corrected in dehydrated or hypovolemic patients prior to initiating treatment. Renal function should be monitored in patients with renal or liver dysfunction, heart failure, dehydration, or hypovolemia during therapy. NSAIDs should be avoided in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function; if an NSAID is used in such patients, they should be monitored for signs of worsening renal function.

Mefenamic acid has a major potential interaction with Intestinal Anastomoses.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a major potential interaction with Ischemic Heart Disease.

Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. Clinical trials of several cyclooxygenase-2 (COX-2) selective and nonselective NSAIDs of up to 3 years duration have supported this increased risk. It is unclear from available data if the risk for cardiovascular thrombotic events is similar for all NSAIDs. Therapy with NSAIDs should be administered cautiously in patients with a history of cardiovascular or cerebrovascular disease. Patients should be treated with the lowest effective dosage for the shortest duration necessary. Appropriate antiplatelet therapy should be administered to patients requiring cardioprotection; however, there is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious cardiovascular thrombotic events associated with NSAID use, while the risk of serious gastrointestinal events is increased. Physicians and patients should remain alert for the development of adverse cardiovascular events throughout the entire duration of therapy, even without prior cardiovascular symptoms. Patients should be advised to promptly seek medical attention if they experience symptoms of cardiovascular thrombotic events (including chest pain, shortness of breath, weakness, or slurring of speech).

NSAIDs are contraindicated in the setting of coronary artery bypass graft (CABG) surgery. Two large clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10 to 14 days following CABG surgery found an increased incidence of myocardial infarction and stroke.

The use of NSAIDs should be avoided in patients with a recent myocardial infarction unless the benefits are expected to outweigh the risk of recurrent cardiovascular thrombotic events. If an NSAID is used in patients with a recent myocardial infarction, they should be monitored for signs of cardiac ischemia.

Mefenamic acid has a major potential interaction with Liver Disease.

Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) has resulted in renal papillary necrosis and other renal injury. Renal toxicity has been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion; in such patients, NSAIDs may cause a dose-dependent reduction in prostaglandin synthesis and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk for this reaction include those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction; those taking diuretics, angiotensin-converting enzyme inhibitors, or angiotensin receptor blockers; and older adult patients. Discontinuation of NSAID therapy generally leads to recovery to the pretreatment state. No information is available regarding NSAID use in patients with advanced renal disease; the renal effects of NSAIDs may hasten the progression of renal dysfunction in patients with preexisting renal disease. Volume status should be corrected in dehydrated or hypovolemic patients prior to initiating treatment. Renal function should be monitored in patients with renal or liver dysfunction, heart failure, dehydration, or hypovolemia during therapy. NSAIDs should be avoided in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function; if an NSAID is used in such patients, they should be monitored for signs of worsening renal function.

Ivacaftor has a moderate potential interaction with Liver Disease.

There are no data on the use of ivacaftor in patients with severe liver dysfunction. Ivacaftor should not be used in patients less than 6 months of age with any level of hepatic impairment. Caution is recommended if using products containing ivacaftor in cystic fibrosis (CF) patients with advanced liver disease. Use of ivacaftor in these patients has been associated with worsening of liver function, including hepatic encephalopathy. In CF patients with pre-existing cirrhosis with portal hypertension, liver function decompensation, including liver failure leading to death, has been reported. Closely monitor patients as recommended by the manufacturer after initiating treatment, especially in those with liver disease or a history of transaminase/bilirubin elevations.

Mefenamic acid has a moderate potential interaction with Liver Disease.

Therapy with nonsteroidal anti-inflammatory drugs (NSAIDs) should be administered cautiously in patients with preexisting liver disease. Periodic monitoring of liver function is recommended during prolonged therapy. NSAIDs are also highly protein-bound and some are extensively metabolized by the liver. Metabolic activity and/or plasma protein binding may be altered in patients with hepatic impairment. A dosage reduction may be required in some cases.

Mefenamic acid has a major potential interaction with Noninfectious Colitis.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Ivacaftor has a moderate potential interaction with Organ Transplant.

The use of products containing ivacaftor has not been studied in patients with cystic fibrosis who have undergone organ transplantation. Use in transplanted patients is not recommended due to potential drug-drug interactions with immunosuppressants.

Mefenamic acid has a major potential interaction with Peptic Ulcer.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Ivacaftor has a moderate potential interaction with Pulmonary Impairment.

The use of products containing ivacaftor is associated with respiratory events (e.g., chest discomfort, dyspnea, and respiration abnormal). Close monitoring is recommended in patients with advanced lung disease (percent predicted FEV1 less than 40).

Mefenamic acid has a major potential interaction with Renal Dysfunction.

Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) has resulted in renal papillary necrosis and other renal injury. Renal toxicity has been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion; in such patients, NSAIDs may cause a dose-dependent reduction in prostaglandin synthesis and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk for this reaction include those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction; those taking diuretics, angiotensin-converting enzyme inhibitors, or angiotensin receptor blockers; and older adult patients. Discontinuation of NSAID therapy generally leads to recovery to the pretreatment state. No information is available regarding NSAID use in patients with advanced renal disease; the renal effects of NSAIDs may hasten the progression of renal dysfunction in patients with preexisting renal disease. Volume status should be corrected in dehydrated or hypovolemic patients prior to initiating treatment. Renal function should be monitored in patients with renal or liver dysfunction, heart failure, dehydration, or hypovolemia during therapy. NSAIDs should be avoided in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function; if an NSAID is used in such patients, they should be monitored for signs of worsening renal function.

Ivacaftor has a moderate potential interaction with Renal Dysfunction.

Ivacaftor has not been studied in patients with renal impairment. No dose adjustment is necessary for patients with mild or moderate renal impairment, however, caution is recommended in patients with severe renal impairment or end-stage renal disease.

Mefenamic acid has a moderate potential interaction with Renal Dysfunction.

Increases in serum potassium concentration (including hyperkalemia) have been reported with use of nonsteroidal anti-inflammatory drugs (NSAIDs), even in some patients without renal impairment. In patients with normal renal function, these effects have been attributed to a hyporeninemic-hypoaldosteronism state. Caution is advised in patients with hyperkalemia.

Mefenamic acid has a major potential interaction with Smoking.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can develop at any time, with or without warning symptoms. NSAIDs should be used with caution in patients with history of peptic ulcer disease and/or GI bleeding, as these patients had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Caution is also advised if NSAIDs are prescribed to patients with other factors that increase risk of GI bleeding, such as: prolonged NSAID therapy; concomitant use of oral corticosteroids, antiplatelet agents (e.g., aspirin), anticoagulants, selective serotonin reuptake inhibitors; alcohol use; smoking; history of gastrointestinal surgery or anastomosis, older age; poor general health status; and advanced liver disease and/or coagulopathy. Particular vigilance is necessary when treating older adult or debilitated patients since most postmarketing reports of fatal GI events occurred in these patients.

Mefenamic acid has a moderate potential interaction with Thrombocytopathy.

Nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly inhibit platelet adhesion and aggregation and may prolong bleeding time in some patients. With the exception of aspirin, the platelet effects seen with most NSAIDs at usual recommended dosages are generally slight and of relatively short duration but may be more pronounced in patients with underlying hemostatic abnormalities. Thrombocytopenia has also been reported rarely during NSAID use. Therapy with NSAIDs should be administered cautiously in patients with significant active bleeding or a hemorrhagic diathesis, including hemostatic and/or coagulation defects associated with hemophilia, vitamin K deficiency, hypoprothrombinemia, thrombocytopenia, thrombocytopathy, or severe hepatic impairment. NSAIDs that selectively inhibit cyclooxygenase-2 (i.e., COX-2 inhibitors) do not appear to affect platelet function or bleeding time at indicated dosages and may be preferable if risk of bleeding is a concern.

Mefenamic acid has a moderate potential interaction with Thrombocytopenia.

Nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly inhibit platelet adhesion and aggregation and may prolong bleeding time in some patients. With the exception of aspirin, the platelet effects seen with most NSAIDs at usual recommended dosages are generally slight and of relatively short duration but may be more pronounced in patients with underlying hemostatic abnormalities. Thrombocytopenia has also been reported rarely during NSAID use. Therapy with NSAIDs should be administered cautiously in patients with significant active bleeding or a hemorrhagic diathesis, including hemostatic and/or coagulation defects associated with hemophilia, vitamin K deficiency, hypoprothrombinemia, thrombocytopenia, thrombocytopathy, or severe hepatic impairment. NSAIDs that selectively inhibit cyclooxygenase-2 (i.e., COX-2 inhibitors) do not appear to affect platelet function or bleeding time at indicated dosages and may be preferable if risk of bleeding is a concern.

Mefenamic acid has a moderate potential interaction with Vitamin K Deficiency.

Nonsteroidal anti-inflammatory drugs (NSAIDs) reversibly inhibit platelet adhesion and aggregation and may prolong bleeding time in some patients. With the exception of aspirin, the platelet effects seen with most NSAIDs at usual recommended dosages are generally slight and of relatively short duration but may be more pronounced in patients with underlying hemostatic abnormalities. Thrombocytopenia has also been reported rarely during NSAID use. Therapy with NSAIDs should be administered cautiously in patients with significant active bleeding or a hemorrhagic diathesis, including hemostatic and/or coagulation defects associated with hemophilia, vitamin K deficiency, hypoprothrombinemia, thrombocytopenia, thrombocytopathy, or severe hepatic impairment. NSAIDs that selectively inhibit cyclooxygenase-2 (i.e., COX-2 inhibitors) do not appear to affect platelet function or bleeding time at indicated dosages and may be preferable if risk of bleeding is a concern.