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Interactions between Exxua and Quinidine

1 drug interaction and 26 additional warnings found for the following 2 drugs:

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Drug interactions

Major drug interactions

Major:

quiNIDine gepirone

Applies to: quinidine and Exxua (gepirone)
Generally avoid

Class IA (e.g., disopyramide, quinidine, procainamide) and class III (e.g., amiodarone, dofetilide, sotalol) antiarrhythmic agents can cause dose-related prolongation of the QT interval. Theoretically, coadministration with other agents that can prolong the QT interval may result in additive effects and increased risk of ventricular arrhythmias including torsade de pointes and sudden death. In general, the risk of an individual agent or a combination of agents causing ventricular arrhythmia in association with QT prolongation is largely unpredictable but may be increased by certain underlying risk factors such as congenital long QT syndrome, cardiac disease, and electrolyte disturbances (e.g., hypokalemia, hypomagnesemia). In addition, the extent of drug-induced QT prolongation is dependent on the particular drug(s) involved and dosage(s) of the drug(s).

Management

Coadministration of class IA or class III antiarrhythmic agents with other drugs that can prolong the QT interval should preferably be avoided unless benefits are anticipated to outweigh the risks. Caution and clinical monitoring are recommended if concomitant use is required. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

References (13)
  1. (2002) "Product Information. Cordarone (amiodarone)." Wyeth-Ayerst Laboratories
  2. (2002) "Product Information. Vascor (bepridil)." McNeil Pharmaceutical
  3. (2001) "Product Information. Procan SR (procainamide)." Parke-Davis
  4. "Product Information. Quiniglute (quinidine)." Berlex, Richmond, CA.
  5. (2001) "Product Information. Betapace (sotalol)." Berlex Laboratories
  6. (2001) "Product Information. Norpace (disopyramide)." Searle
  7. Trujillo TC, Nolan PE (2000) "Antiarrhythmic agents - Drug interactions of clinical significance." Drug Safety, 23, p. 509-32
  8. Yamreudeewong W, DeBisschop M, Martin L, Lower D (2003) "Potentially Significant Drug Interactions of Class III Antiarrhythmic Drugs." Drug Saf, 26, p. 421-38
  9. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  10. Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
  11. Cerner Multum, Inc. "Australian Product Information."
  12. EMA. European Medicines Agency. European Union (2013) EMA - List of medicines under additional monitoring. http://www.ema.europa.eu/ema/index.jsp?curl=pages/regulation/document_listing/document_listing_000366.jsp&mid=WC0b01ac058067c852
  13. Maxa JL, Hebeler RF, Adeeko MA (2006) "Torsades de pointes following concurrent amiodarone and levofloxacin therapy." Proc (Bayl Univ Med Cent), 19, p. 345-6

Food/lifestyle interactions

Moderate food/lifestyle interactions

Moderate:

quiNIDine Food/Lifestyle

Applies to: quinidine
Generally avoid

In a small, randomized, crossover study, the administration of quinidine with grapefruit juice (compared to water) to healthy volunteers significantly prolonged the time to reach peak plasma quinidine concentrations and decreased the plasma concentrations of its major metabolite, 3-hydroxyquinidine. These changes were associated pharmacodynamically with both a delay and a reduction in the maximal effect on QTc interval. The proposed mechanism is delay of gastric emptying as well as inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall induced by certain compounds present in grapefruits.

Management

Given the drug's narrow therapeutic index, patients receiving quinidine therapy should avoid the consumption of grapefruits and grapefruit juice to prevent any undue fluctuations in plasma drug levels.

References (4)
  1. Ace LN, Jaffe JM, Kunka RL (1983) "Effect of food and an antacid on quinidine bioavailability." Biopharm Drug Dispos, 4, p. 183-90
  2. Min DI, Ku YM, Geraets DR, Lee HC (1996) "Effect of grapefruit juice on the pharmacokinetics and pharmacodynamics of quinidine in healthy volunteers." J Clin Pharmacol, 36, p. 469-76
  3. Ha HR, Chen J, Leuenberger PM, Freiburghaus AU, Follah F (1995) "In vitro inhibition of midazolam and quinidine metabolism by flavonoids." Eur J Clin Pharmacol, 48, p. 367-71
  4. Bailey DG, Dresser GR, Kreeft JH, Munoz C, Freeman DJ, Bend JR (2000) "Grapefruit-felodipine interaction: Effect of unprocessed fruit and probable active ingredients." Clin Pharmacol Ther, 68, p. 468-77
Moderate:

gepirone Food/Lifestyle

Applies to: Exxua (gepirone)
Generally avoid

Grapefruit and/or grapefruit juice may increase the plasma concentrations and effects of gepirone. The proposed mechanism is inhibition of CYP450 3A4 mediated first-pass metabolism in the gut wall by certain compounds present in grapefruit. Inhibition of hepatic CYP450 3A4 may also contribute. The interaction has not been studied with grapefruit juice, but has been reported for other CYP450 3A4 inhibitors. For example, when subjects who were at steady state on the strong CYP450 3A4 inhibitor ketoconazole (200 mg twice daily) received a single dose of gepirone (36.3 mg), the maximum plasma concentration (Cmax) and systemic exposure (AUC) of gepirone increased by approximately 5-fold. Similarly, when subjects who were at steady state on the moderate CYP450 3A4 inhibitor verapamil (80 mg three times daily) received a single dose of gepirone (18.2 mg), the maximum plasma concentration (Cmax) and systemic exposure (AUC) of gepirone increased by approximately 2.6-fold. In general, the effects of grapefruit products are concentration-, dose-, and preparation-dependent and can vary widely among both brands and individual patients. Some preparations have demonstrated strong CYP450 3A4 inhibition, while others have demonstrated moderate inhibition.

Adjust dosing interval

Food enhances the bioavailability of gepirone and its major active metabolites (3'-OH-gepirone and 1-PP). The magnitude of the effect is dependent on the fat content of the meal, but the systemic exposure of gepirone and its major metabolites was consistently higher under fed conditions as compared to the fasted state. The peak plasma concentration (Cmax) of gepirone after intake of a low-fat (about 200 calorie) breakfast was 27% higher, after a medium-fat (about 500 calorie) breakfast was 55% higher, and after a high-fat (about 850 calorie) breakfast was 62% higher than the Cmax achieved in the fasted state. Likewise, the systemic exposure (AUC) of gepirone was about 14% higher after a low-fat breakfast, 22% higher after a medium-fat breakfast, and 32% to 37% higher after a high-fat breakfast when compared to the AUC achieved in the fasted state. The effect of varying amounts of fat on the AUC and Cmax of 3'-OH-gepirone and 1-PP were similar to that of gepirone.

Management

Coadministration of gepirone with grapefruit products should be avoided. If grapefruit juice is consumed, monitoring for adverse effects (e.g., QT prolongation, serotonin syndrome, dizziness, nausea, insomnia, abdominal pain, and/or dyspepsia) should be considered. Gepirone should be taken orally with food at the approximately the same time each day. Tablets should be swallowed whole.

References (4)
  1. (2023) "Product Information. Exxua (gepirone)." Mission Pharmacal Company, 1
  2. FDA. U.S. Food and Drug Administration (2024) Grapefruit juice and some drugs don't mix. https://www.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix
  3. Chen M, Zhou S, Fabriaga E, Zhang P, Zhou Q (2024) Food-drug interactions precipitated by fruit juices other than grapefruit juice: an update review. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9326888/
  4. Kiani J, Imam SZ (2024) Medicinal importance of grapefruit juice and its interaction with various drugs. https://nutritionj.biomedcentral.com/articles/10.1186/1475-2891-6-33

Disease interactions

24 potential interactions Applies to: 18 conditions, including Depression, Bipolar Disorder, Underactive Thyroid, Heart Failure, and Hypokalemia.

Bipolar Disorder

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Bipolar Disorder.

Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term trials; these trials did not show increased risk in patients older than 24 years and risk was reduced in patients 65 years and older. Adult and pediatric patients with major depressive disorder may experience worsening of their depression and/or the emergence of suicidal ideation and behavior (suicidality) or unusual changes in behavior, whether or not they are taking antidepressants; this risk may persist until significant remission occurs. Suicide is a known risk of depression and certain other psychiatric disorders; such disorders are the strongest predictors of suicide. Patients of all ages treated with antidepressants for any indication should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the first few months of drug therapy, and at times of dose changes. Family members/caregivers should be advised to monitor for changes in behavior and to notify the health care provider. Changing the therapeutic regimen (including discontinuing the medication) should be considered in patients whose depression is persistently worse, or who are experiencing emergent suicidal thoughts or behaviors.

Moderate:

Exxua

The gepirone in Exxua has a moderate potential interaction with Bipolar Disorder.

All antidepressants may occasionally cause mania or hypomania, particularly in patients with bipolar disorder. Therapy with antidepressants should be administered cautiously in patients with a history of mania/hypomania.

Cardiovascular Conditions and Disorders

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Cardiovascular Conditions and Disorders.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Depression

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Depression.

Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term trials; these trials did not show increased risk in patients older than 24 years and risk was reduced in patients 65 years and older. Adult and pediatric patients with major depressive disorder may experience worsening of their depression and/or the emergence of suicidal ideation and behavior (suicidality) or unusual changes in behavior, whether or not they are taking antidepressants; this risk may persist until significant remission occurs. Suicide is a known risk of depression and certain other psychiatric disorders; such disorders are the strongest predictors of suicide. Patients of all ages treated with antidepressants for any indication should be monitored appropriately and observed closely for clinical worsening, suicidality, and unusual changes in behavior, especially during the first few months of drug therapy, and at times of dose changes. Family members/caregivers should be advised to monitor for changes in behavior and to notify the health care provider. Changing the therapeutic regimen (including discontinuing the medication) should be considered in patients whose depression is persistently worse, or who are experiencing emergent suicidal thoughts or behaviors.

Glaucoma/Intraocular Hypertension

Major:

quinidine

quiNIDine has a major potential interaction with Glaucoma/Intraocular Hypertension.

The use of quinidine is contraindicated in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as myasthenia gravis, glaucoma, and urinary retention or obstruction.

Heart Block

Major:

quinidine

quiNIDine has a major potential interaction with Heart Block.

The use of quinidine is contraindicated for use in patients without a functioning artificial pacemaker whose cardiac rhythm is dependent upon a junctional or idioventricular pacemaker, including patients with complete AV block. Therapy with quinidine should be administered with caution in patients with severe sinus-node dysfunction such as sick sinus syndrome, bradycardia-tachycardia syndrome, or second- or third-degree heart block.

Heart Disease

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Heart Disease.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Heart Failure

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Heart Failure.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Major:

quinidine

quiNIDine has a major potential interaction with Heart Failure.

Antiarrhythmic agents can induce severe hypotension (particularly with IV administration) or induce or worsen congestive heart failure (CHF). Patients with primary cardiomyopathy or inadequately compensated CHF are at increased risk. Antiarrhythmic agents should be administered cautiously and dosage and/or frequency of administration modified in patients with hypotension or adequately compensated CHF. Alternative therapy should be considered unless these conditions are secondary to cardiac arrhythmia.

Hyperkalemia

Moderate:

quinidine

quiNIDine has a moderate potential interaction with Hyperkalemia.

Electrolyte imbalance can alter the therapeutic effectiveness of antiarrhythmic agents. Hypokalemia and hypomagnesemia can reduce the effectiveness of antiarrhythmic agents. In some cases, these disorders can exaggerate the degree of QTc prolongation and increase the potential for torsade de pointes. Hyperkalemia can potentiate the toxic effects of antiarrhythmic agents. Electrolyte imbalance should be corrected prior to initiating antiarrhythmic therapy. Clinical monitoring of cardiac function and electrolyte concentrations is recommended.

Hypokalemia

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Hypokalemia.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Moderate:

quinidine

quiNIDine has a moderate potential interaction with Hypokalemia.

Electrolyte imbalance can alter the therapeutic effectiveness of antiarrhythmic agents. Hypokalemia and hypomagnesemia can reduce the effectiveness of antiarrhythmic agents. In some cases, these disorders can exaggerate the degree of QTc prolongation and increase the potential for torsade de pointes. Hyperkalemia can potentiate the toxic effects of antiarrhythmic agents. Electrolyte imbalance should be corrected prior to initiating antiarrhythmic therapy. Clinical monitoring of cardiac function and electrolyte concentrations is recommended.

Hypotension

Major:

quinidine

quiNIDine has a major potential interaction with Hypotension.

Antiarrhythmic agents can induce severe hypotension (particularly with IV administration) or induce or worsen congestive heart failure (CHF). Patients with primary cardiomyopathy or inadequately compensated CHF are at increased risk. Antiarrhythmic agents should be administered cautiously and dosage and/or frequency of administration modified in patients with hypotension or adequately compensated CHF. Alternative therapy should be considered unless these conditions are secondary to cardiac arrhythmia.

Liver Disease

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Liver Disease.

Exposure to gepirone is increased in patients with hepatic impairment. Use of gepirone in patients with severe hepatic impairment (Child-Pugh C) is contraindicated. A dose reduction is recommended in patients with moderate hepatic impairment (Child-Pugh B). No dosage adjustment is recommended patients with mild hepatic impairment (Child-Pugh A).

Moderate:

quinidine

quiNIDine has a moderate potential interaction with Liver Disease.

Quinidine is primarily metabolized by the liver to active and inactive forms. Hepatic dysfunction causes a slowed metabolism and elimination of the drug which can lead to quinidine toxicity if dosage is not appropriately reduced. Clinical monitoring of hepatic function is recommended.

Long QT Syndrome

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Long QT Syndrome.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Magnesium Imbalance

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Magnesium Imbalance.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Moderate:

quinidine

quiNIDine has a moderate potential interaction with Magnesium Imbalance.

Electrolyte imbalance can alter the therapeutic effectiveness of antiarrhythmic agents. Hypokalemia and hypomagnesemia can reduce the effectiveness of antiarrhythmic agents. In some cases, these disorders can exaggerate the degree of QTc prolongation and increase the potential for torsade de pointes. Hyperkalemia can potentiate the toxic effects of antiarrhythmic agents. Electrolyte imbalance should be corrected prior to initiating antiarrhythmic therapy. Clinical monitoring of cardiac function and electrolyte concentrations is recommended.

Mania

Moderate:

Exxua

The gepirone in Exxua has a moderate potential interaction with Mania.

All antidepressants may occasionally cause mania or hypomania, particularly in patients with bipolar disorder. Therapy with antidepressants should be administered cautiously in patients with a history of mania/hypomania.

Myasthenia Gravis

Major:

quinidine

quiNIDine has a major potential interaction with Myasthenia Gravis.

The use of quinidine is contraindicated in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as myasthenia gravis, glaucoma, and urinary retention or obstruction.

Renal Dysfunction

Moderate:

Exxua

The gepirone in Exxua has a moderate potential interaction with Renal Dysfunction.

Patients with renal impairment may experience reduced metabolism and excretion of gepirone. The recommended dose of gepirone in patients with CrCl less than 50 mL/min is reduced as compared to patients with normal renal function. No dosage adjustment is recommended for patients with CrCl 50 mL/min or greater.

Moderate:

quinidine

quiNIDine has a moderate potential interaction with Renal Dysfunction.

Renal dysfunction causes a slowed elimination of quinidine which can lead to quinidine toxicity if dosage is not appropriately reduced. Therapy with quinidine should be administered cautiously and dosages reduced in patients with compromised renal function. Quinidine is not appreciably removed by hemodialysis.

Underactive Thyroid

Major:

Exxua

The gepirone in Exxua has a major potential interaction with Underactive Thyroid.

This drug prolongs the QT interval. Use of gepirone in patients with congenital long QT syndrome is contraindicated. Treatment is also contraindicated in patients with severe hepatic impairment or in patients receiving concomitant strong CYP450 3A4 inhibitors because plasma drug concentrations may be increased in these population. Gepirone should not be initiated in patients with baseline QTc greater than 450 msec, and the dosage of gepirone should not be escalated if the QTcF is greater than 450 msec. Electrolyte abnormalities should be corrected prior to starting treatment, and then monitored during dose titration and periodically during treatment in patients with electrolyte abnormalities, or who are receiving diuretics or glucocorticoids, or who have a history of hypokalemia or hypomagnesemia. An electrocardiogram (ECG) should be performed prior to initiating therapy, during dosage titration, and periodically during treatment. Monitor patients with ECGs more frequently if gepirone is used concomitantly with drugs known to prolong the QT interval, in patients who develop a QTc of 450 msec or greater during treatment, or in patients with a significant risk of developing torsade de pointes, including those with uncontrolled or significant cardiac disease, recent myocardial infarction, heart failure, unstable angina, bradyarrhythmias, uncontrolled hypertension, high-degree atrioventricular block, severe aortic stenosis, or uncontrolled hypothyroidism. Reduce the dose of this drug when used concomitantly with moderate CYP3A4 inhibitors, as they may increase drug concentrations.

Urinary Retention

Major:

quinidine

quiNIDine has a major potential interaction with Urinary Retention.

The use of quinidine is contraindicated in patients with preexisting conditions that are likely to be exacerbated by anticholinergic activity, such as myasthenia gravis, glaucoma, and urinary retention or obstruction.

More resources

Exxua

A total of 508 drugs are known to interact with Exxua.

quinidine

A total of 669 drugs are known to interact with quinidine.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.