Can you take Emblon with Nevirapine?
1 drug interaction and 11 additional warnings found for the following 2 drugs:
- Emblon (tamoxifen)
- nevirapine
Drug interactions
Moderate drug interactions
Moderate:
tamoxifen nevirapine
Applies to: Emblon (tamoxifen) and nevirapine
Nevirapine may reduce the blood levels of tamoxifen, which may make the medication less effective in some cases.
Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications.
It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Food/lifestyle interactions
Moderate food/lifestyle interactions
Moderate:
tamoxifen Food/Lifestyle
Applies to: Emblon (tamoxifen)
Talk to your doctor before using tamoxifen with soy products.
There is some evidence that substances present in soy may stimulate breast tumor growth and interfere with the action of tamoxifen, although this has not been proven.
Whether soy products are effective for hot flashes is also uncertain.
It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Disease interactions
10 potential interactions Applies to: 9 conditions, including Thrombotic/Thromboembolic Disorder, Hemodialysis, Liver Disease, Bleeding Disorder, and Visual Defect/Disturbance.
Bleeding Disorder
Moderate:
Emblon
The tamoxifen in Emblon has a moderate potential interaction with Bleeding Disorder.
Hematological abnormalities during tamoxifen therapy may include thrombocytopenia, leukopenia, and anemia. Rare hemorrhagic episodes, severe neutropenia and pancytopenia have been reported. Therapy with tamoxifen should be administered cautiously to patients with or predisposed to bone marrow suppression.
Bone Marrow Depression/Low Blood Counts
Moderate:
Emblon
The tamoxifen in Emblon has a moderate potential interaction with Bone Marrow Depression/Low Blood Counts.
Hematological abnormalities during tamoxifen therapy may include thrombocytopenia, leukopenia, and anemia. Rare hemorrhagic episodes, severe neutropenia and pancytopenia have been reported. Therapy with tamoxifen should be administered cautiously to patients with or predisposed to bone marrow suppression.
Dermatitis, Drug-Induced
Major:
nevirapine
Nevirapine has a major potential interaction with Dermatitis, Drug-Induced.
Nevirapine can cause severe, life-threatening skin reactions such as Stevens-Johnson syndrome, toxic epidermal necrolysis, and hypersensitivity reactions characterized by rash, constitutional findings, and organ dysfunction including hepatic failure. Fatalities in association with these reactions have been reported. The first 6 weeks of therapy is the period of greatest risk, and intense monitoring is recommended during the first 18 weeks. In controlled clinical trials, Grade 3 and 4 rashes were reported during the first 6 weeks in 1.5 % of nevirapine-treated patients compared to 0.1% of placebo subjects. Patients who develop signs or symptoms of severe skin reactions or hypersensitivity reactions possibly related to nevirapine at any time during therapy must discontinue the drug and seek medical attention immediately. Because nevirapine-induced hepatitis and hepatic failure may be associated with hypersensitivity reactions, liver function tests should be performed in these patients as well as all patients who develop a rash within the first 18 weeks of treatment. Nevirapine should be permanently discontinued if clinical hepatitis or transaminase elevations combined with rash or other systemic symptoms occur, and should not be restarted after recovery. Nevirapine therapy should also not be restarted following severe skin or hypersensitivity reactions or a rash that is accompanied by fever, general malaise, fatigue, muscle or joint aches, blisters, oral lesions, conjunctivitis, facial edema, eosinophilia, granulocytopenia, lymphadenopathy, or renal dysfunction. During the initial 2-week lead-in period of 200 mg/day (4 mg/kg/day in pediatric patients), the dosage of nevirapine should not be increased if any rash occurs. Dose escalation should only be attempted after the rash resolves.
Endometrial Dysplasia
Moderate:
Emblon
The tamoxifen in Emblon has a moderate potential interaction with Endometrial Dysplasia.
Endometrial changes such as hyperplasia, polyps, and endometrial cancer have been reported during tamoxifen therapy. Patients should be instructed to immediately report any signs or symptoms of uterine abnormality such as menstrual irregularities, abnormal vaginal bleeding, change in vaginal discharge, or pelvic pain or pressure. Therapy with tamoxifen should be administered cautiously in patients with or history of gynecological abnormalities.
Hemodialysis
Moderate:
nevirapine
Nevirapine has a moderate potential interaction with Hemodialysis.
Nevirapine is partially removed by hemodialysis. In a pharmacokinetic study of nevirapine in patients with renal impairment, six subjects requiring hemodialysis exhibited a 44% reduction in nevirapine systemic exposure (AUC) over a one-week period. There was also evidence of accumulation of nevirapine hydroxy-metabolites in plasma in these patients; however, the clinical significance is unknown. A supplemental dose following each dialysis session is indicated for patients undergoing chronic hemodialysis.
Liver Disease
Major:
nevirapine
Nevirapine has a major potential interaction with Liver Disease.
The use of nevirapine has been associated with severe, life-threatening, and fatal hepatotoxicity, particularly in the first 18 weeks of therapy. Fulminant and cholestatic hepatitis, hepatic necrosis, and hepatic failure have been reported. Nevirapine-induced hepatitis and hepatic failure may be associated with signs of hypersensitivity, which can include severe rash or rash accompanied by fever, general malaise, fatigue, muscle or joint aches, blisters, oral lesions, conjunctivitis, facial edema, eosinophilia, granulocytopenia, lymphadenopathy, or renal dysfunction. In controlled clinical trials, symptomatic hepatic events regardless of severity occurred on average in 4% (range 0% to 11%) of patients who received nevirapine and 1.2% of patients in control groups. The risk was greatest in the first 6 weeks of therapy and continued to be greater in the nevirapine groups compared to controls through 18 weeks of treatment. In general, the patients at greatest risk of hepatic events are women with high CD4 counts. During the first 6 weeks of treatment, women have a 3-fold higher risk than men for symptomatic, often rash-associated, hepatic events (5.8% vs. 2.2%). In a retrospective review, women with CD4 counts greater than 250 cells/mm3 had a 12-fold higher risk of symptomatic hepatic events compared to women with lower CD4 counts (11% vs. 0.9%). A 5-fold increased risk was observed in men with CD4 counts greater than 400 cells/mm3 compared to men with lower CD4 counts (6.3% vs. 1.2%). Additionally, coinfection with hepatitis B or C and/or increased liver function tests at the start of therapy are associated with a greater risk of later symptomatic events (6 weeks or more after starting nevirapine) and asymptomatic increases in AST or ALT. Therapy with nevirapine should be administered cautiously in patients with preexisting liver disease or liver function test abnormalities. Due to the risk of drug accumulation, nevirapine should not be administered to patients with severe hepatic impairment. All patients treated with nevirapine should undergo intensive clinical and laboratory monitoring (i.e., once a month or more) during the first 18 weeks of therapy, and regular monitoring thereafter. Liver function tests should be performed at baseline, prior to dose escalation, and at two weeks post-dose escalation. Patients should be instructed to discontinue nevirapine and seek medical attention promptly if signs and symptoms of hepatic injury or hypersensitivity develop such as fever, pruritus, rash, facial edema, anorexia, nausea, vomiting, fatigue, right upper quadrant pain, dark urine, and jaundice. Nevirapine should be permanently discontinued if clinical hepatitis or transaminase elevations combined with rash or other systemic symptoms occur, and should not be restarted after recovery. In some cases, hepatic injury progresses despite discontinuation of treatment.
Moderate:
Emblon
The tamoxifen in Emblon has a moderate potential interaction with Liver Disease.
Tamoxifen is extensively metabolized by the liver and excreted in the feces. Alteration in liver enzyme levels have been noted. Severe hepatic injuries such as fatty liver, cholestasis, hepatitis, and hepatic necrosis are rare, however, deaths have been reported. Patients should be instructed to immediately report any sign or symptoms of hepatic dysfunction such as jaundice, dark urine, right upper quadrant pain, or anorexia. Therapy with tamoxifen should be administered cautiously in patients with or predisposed to compromised hepatic function.
Renal Dysfunction
Moderate:
nevirapine
Nevirapine has a moderate potential interaction with Renal Dysfunction.
Nevirapine metabolites are primarily eliminated by the kidney. The clinical significance of possible reduced metabolite clearance in renal impairment is uncertain. Therapy with nevirapine should be administered cautiously in patients with renal impairment.
Thrombotic/Thromboembolic Disorder
Major:
Emblon
The tamoxifen in Emblon has a major potential interaction with Thrombotic/Thromboembolic Disorder.
The use of tamoxifen is contraindicated in women with a history of deep vein thrombosis or pulmonary embolus or in women who require concomitant coumarin- type anticoagulant therapy. There is evidence of an increased incidence of thromboembolic events, including deep vein thrombosis and pulmonary embolism, during tamoxifen therapy.
Visual Defect/Disturbance
Moderate:
Emblon
The tamoxifen in Emblon has a moderate potential interaction with Visual Defect/Disturbance.
Corneal changes, cataracts, and retinopathy have been reported during tamoxifen therapy. Therapy with tamoxifen should be administered cautiously in patients with or predisposed to visual disturbances.
More resources
Emblon
A total of 480 drugs are known to interact with Emblon.
- Emblon is in the following drug classes: hormones/antineoplastics, selective estrogen receptor modulators.
- Emblon is used to treat the following conditions:
nevirapine
A total of 461 drugs are known to interact with nevirapine.
- Nevirapine is in the drug class NNRTIs.
- Nevirapine is used to treat the following conditions:
Drug Interaction Classification
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| 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. | |
| No interaction information available. |
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.