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Can you take Bepridil with Enzalutamide?

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

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Drug interactions

Major drug interactions

Major:

bepridil enzalutamide

Applies to: bepridil and enzalutamide

Using bepridil together with enzalutamide can increase the risk of an irregular heart rhythm that may be serious and potentially life-threatening, although it is a relatively rare side effect.

You may be more susceptible if you have:

  • a heart condition called congenital long QT syndrome
  • other cardiac diseases
  • conduction abnormalities
  • electrolyte disturbances (for example, magnesium or potassium loss due to severe or prolonged diarrhea or vomiting)

Talk to your doctor if you have any questions or concerns. Your doctor may already be aware of the risks, but has determined that this is the best course of treatment for you and has taken appropriate precautions and is monitoring you closely for any potential complications.

You should seek immediate medical attention if you develop sudden dizziness, lightheadedness, fainting, shortness of breath, or heart palpitations during treatment with these medications, whether together or alone.

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:

bepridil Food/Lifestyle

Applies to: bepridil

Grapefruit juice may increase the blood levels of certain medications such as bepridil.

You may want to limit your consumption of grapefruit and grapefruit juice during treatment with bepridil. However, if you have been regularly consuming grapefruit or grapefruit juice with the medication, then it is advisable for you to talk with your doctor before changing the amounts of these products in your diet, as this may alter the effects of your medication.

Contact your doctor if your condition changes or you experience increased side effects.

Orange juice is not expected to interact.

Moderate:

bepridil Alcohol (Ethanol)

Applies to: bepridil

Ethanol and bepridil may have additive effects in lowering your blood pressure.

You may experience headache, dizziness, lightheadedness, fainting, or changes in pulse or heart rate, especially when treatment is started, the dose is changed, or treatment is restarted.

Tell your doctor promptly if these symptoms occur and seek urgent medical help if you faint or have severe dizziness.

Avoid driving or operating hazardous machinery until you know how the medications affect you, and use caution when getting up from a sitting or lying position.

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.

Moderate:

bepridil multivitamins with minerals

Applies to: bepridil

Using bepridil together with multivitamins with minerals can decrease the effects of bepridil.

Talk with your doctor before using bepridil and multivitamins with minerals together. You may need a dose adjustment or need your blood pressure checked more often if you take 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.

Disease interactions

23 potential interactions Applies to: 22 conditions, including Heart Failure, Heart Attack, Seizures, Diarrhea, and Hypokalemia.

Abnormal Electrocardiogram

Major:

bepridil

Bepridil has a major potential interaction with Abnormal Electrocardiogram.

The use of bepridil is contraindicated in patients with a history of serious ventricular arrhythmias; patients with congenital or acquired QT interval prolongation syndromes; and patients treated concomitantly with class IA or III antiarrhythmic drugs or other medications that are known to produce increases in the QT interval or cause torsade de pointes. Bepridil has class I antiarrhythmic properties and can induce new arrhythmias, including ventricular tachycardia and ventricular fibrillation. Patients with other severe arrhythmias may have increased susceptibility to the proarrhythmic effects of bepridil, but use in such patients has been limited. Bepridil can also cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Although the absolute safe upper limit of QT is not known, the manufacturer recommends that the dosage be reduced in patients whose QT interval exceeds 0.52 seconds during treatment. If prolongation remains excessive, the drug should be discontinued.

Brain Tumor

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with Brain Tumor.

Seizures occurred in 0.5% of patients receiving enzalutamide in clinical trials. Patients with predisposing factors for seizures were generally excluded. Caution is advised if using in patients with possible predisposing factors such as history of seizures, history of trauma or head injury, cerebrovascular accident or transient ischemic attack, Alzheimer's disease, meningioma or brain tumor or infection, and any unexplained loss of consciousness in the past 12 months. Enzalutamide should be discontinued permanently in any patient who develops a seizure during treatment.

Cardiogenic Shock

Major:

bepridil

Bepridil has a major potential interaction with Cardiogenic Shock.

In general, calcium channel blockers (CCBs) should not be used in patients with hypotension (systolic pressure < 90 mm Hg) or cardiogenic shock. Due to potential negative inotropic and peripheral vasodilating effects, the use of CCBs may further depress cardiac output and blood pressure, which can be detrimental in these patients. The use of verapamil and diltiazem is specifically contraindicated under these circumstances.

CNS Infection

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with CNS Infection.

Seizures occurred in 0.5% of patients receiving enzalutamide in clinical trials. Patients with predisposing factors for seizures were generally excluded. Caution is advised if using in patients with possible predisposing factors such as history of seizures, history of trauma or head injury, cerebrovascular accident or transient ischemic attack, Alzheimer's disease, meningioma or brain tumor or infection, and any unexplained loss of consciousness in the past 12 months. Enzalutamide should be discontinued permanently in any patient who develops a seizure during treatment.

Diarrhea

Major:

bepridil

Bepridil has a major potential interaction with Diarrhea.

Bepridil can cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Electrolyte disturbances such as hypokalemia and hypomagnesemia may augment the prolongation effect of bepridil on the QT interval and should be corrected prior to institution of bepridil therapy. In addition, patients who experience frequent, severe, and/or prolonged diarrhea may be subject to electrolyte losses and should be followed closely and managed accordingly during therapy with bepridil.

Electrolyte Abnormalities

Major:

bepridil

Bepridil has a major potential interaction with Electrolyte Abnormalities.

Bepridil can cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Electrolyte disturbances such as hypokalemia and hypomagnesemia may augment the prolongation effect of bepridil on the QT interval and should be corrected prior to institution of bepridil therapy. In addition, patients who experience frequent, severe, and/or prolonged diarrhea may be subject to electrolyte losses and should be followed closely and managed accordingly during therapy with bepridil.

Head Injury

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with Head Injury.

Seizures occurred in 0.5% of patients receiving enzalutamide in clinical trials. Patients with predisposing factors for seizures were generally excluded. Caution is advised if using in patients with possible predisposing factors such as history of seizures, history of trauma or head injury, cerebrovascular accident or transient ischemic attack, Alzheimer's disease, meningioma or brain tumor or infection, and any unexplained loss of consciousness in the past 12 months. Enzalutamide should be discontinued permanently in any patient who develops a seizure during treatment.

Heart Attack

Major:

bepridil

Bepridil has a major potential interaction with Heart Attack.

Bepridil has class I antiarrhythmic properties and can induce new arrhythmias, including ventricular tachycardia and ventricular fibrillation. In the National Heart, Lung, and Blood Institute's Cardiac Arrhythmia Suppression Trial involving patients with asymptomatic, non-life-threatening ventricular arrhythmias who have had myocardial infarctions for less than two years previously, an excess rate of mortality/nonfatal cardiac arrest was seen in patients treated with the class I antiarrhythmic agents, encainide and flecainide, compared with that seen in patients assigned to matched placebo-treated groups. Although the applicability of these results to other antiarrhythmic agents is uncertain, the manufacturer recommends generally avoiding the use of bepridil in the post-infarction period. There is also limited experience in the use of bepridil within three months following a myocardial infarction, since it was one of the exclusion criteria in U.S. clinical trials.

Major:

bepridil

Bepridil has a major potential interaction with Heart Attack.

Bepridil may have a negative inotropic effect, particularly at high dosages. Congestive heart failure has been observed infrequently (approximately 1%) in U.S. controlled clinical trials. However, experience with the use of bepridil in the presence of significantly impaired ventricular function is limited, and there is little information on the effect of concomitant administration with digoxin. Therapy with bepridil should be administered cautiously in patients with congestive heart failure, especially if they have severe left ventricular dysfunction (e.g., ejection fraction < 30%) or if they are receiving a beta-adrenergic blocker. Likewise, bepridil should not be given to patients with acute myocardial infarction and pulmonary congestion documented by X-ray on admission, since associated heart failure may be acutely worsened. Mild symptoms of cardiac failure should be under control, if possible, prior to initiating bepridil therapy.

Heart Block

Major:

bepridil

Bepridil has a major potential interaction with Heart Block.

The use of some calcium channel blockers (CCBs) is contraindicated in patients with severe bradyarrhythmia, sick sinus syndrome (unless a functioning pacemaker is present), or heart block greater than the first degree (unless a functioning pacemaker is present). CCBs like bepridil, diltiazem and verapamil have a negative effect on AV conduction and the SA node and may exacerbate these conditions.

Heart Failure

Major:

bepridil

Bepridil has a major potential interaction with Heart Failure.

Bepridil may have a negative inotropic effect, particularly at high dosages. Congestive heart failure has been observed infrequently (approximately 1%) in U.S. controlled clinical trials. However, experience with the use of bepridil in the presence of significantly impaired ventricular function is limited, and there is little information on the effect of concomitant administration with digoxin. Therapy with bepridil should be administered cautiously in patients with congestive heart failure, especially if they have severe left ventricular dysfunction (e.g., ejection fraction < 30%) or if they are receiving a beta-adrenergic blocker. Likewise, bepridil should not be given to patients with acute myocardial infarction and pulmonary congestion documented by X-ray on admission, since associated heart failure may be acutely worsened. Mild symptoms of cardiac failure should be under control, if possible, prior to initiating bepridil therapy.

History - Cerebrovascular Disease

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with History - Cerebrovascular Disease.

Seizures occurred in 0.5% of patients receiving enzalutamide in clinical trials. Patients with predisposing factors for seizures were generally excluded. Caution is advised if using in patients with possible predisposing factors such as history of seizures, history of trauma or head injury, cerebrovascular accident or transient ischemic attack, Alzheimer's disease, meningioma or brain tumor or infection, and any unexplained loss of consciousness in the past 12 months. Enzalutamide should be discontinued permanently in any patient who develops a seizure during treatment.

History - Myocardial Infarction

Major:

bepridil

Bepridil has a major potential interaction with History - Myocardial Infarction.

Bepridil has class I antiarrhythmic properties and can induce new arrhythmias, including ventricular tachycardia and ventricular fibrillation. In the National Heart, Lung, and Blood Institute's Cardiac Arrhythmia Suppression Trial involving patients with asymptomatic, non-life-threatening ventricular arrhythmias who have had myocardial infarctions for less than two years previously, an excess rate of mortality/nonfatal cardiac arrest was seen in patients treated with the class I antiarrhythmic agents, encainide and flecainide, compared with that seen in patients assigned to matched placebo-treated groups. Although the applicability of these results to other antiarrhythmic agents is uncertain, the manufacturer recommends generally avoiding the use of bepridil in the post-infarction period. There is also limited experience in the use of bepridil within three months following a myocardial infarction, since it was one of the exclusion criteria in U.S. clinical trials.

Hypokalemia

Major:

bepridil

Bepridil has a major potential interaction with Hypokalemia.

Bepridil can cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Electrolyte disturbances such as hypokalemia and hypomagnesemia may augment the prolongation effect of bepridil on the QT interval and should be corrected prior to institution of bepridil therapy. In addition, patients who experience frequent, severe, and/or prolonged diarrhea may be subject to electrolyte losses and should be followed closely and managed accordingly during therapy with bepridil.

Hypotension

Major:

bepridil

Bepridil has a major potential interaction with Hypotension.

In general, calcium channel blockers (CCBs) should not be used in patients with hypotension (systolic pressure < 90 mm Hg) or cardiogenic shock. Due to potential negative inotropic and peripheral vasodilating effects, the use of CCBs may further depress cardiac output and blood pressure, which can be detrimental in these patients. The use of verapamil and diltiazem is specifically contraindicated under these circumstances.

Liver Disease

Major:

bepridil

Bepridil has a major potential interaction with Liver Disease.

Calcium channel blockers (CCBs) are extensively metabolized by the liver. The half-lives of CCBs may be prolonged substantially in patients with severe hepatic impairment, with the potential for significant drug accumulation. In addition, the use of some CCBs has been associated with elevations in serum transaminases, both with and without concomitant elevations in alkaline phosphatase and bilirubin. While these effects may be transient and reversible, some patients have developed cholestasis or hepatocellular injury. Therapy with CCBs should be administered cautiously and often at reduced dosages in patients with significantly impaired hepatic function. Periodic monitoring of liver function is advised.

Magnesium Imbalance

Major:

bepridil

Bepridil has a major potential interaction with Magnesium Imbalance.

Bepridil can cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Electrolyte disturbances such as hypokalemia and hypomagnesemia may augment the prolongation effect of bepridil on the QT interval and should be corrected prior to institution of bepridil therapy. In addition, patients who experience frequent, severe, and/or prolonged diarrhea may be subject to electrolyte losses and should be followed closely and managed accordingly during therapy with bepridil.

Neutropenia

Major:

bepridil

Bepridil has a major potential interaction with Neutropenia.

According to the manufacturer, there have been two cases of marked leukopenia and neutropenia reported in U.S. clinical trials of over 800 patients treated with bepridil for up to five years. Both involved diabetic and elderly patients, with one case resulting in death and the other recovering after discontinuation of the drug. In a postmarketing report, a 72-year-old man with severe angina pectoris developed fever and chills associated with an absolute neutrophil count of 35/mm3 six weeks after switching from diltiazem and nitrates to bepridil and nitrates. A bone marrow biopsy revealed profound myeloid hypoplasia. The patient recovered after discontinuation of bepridil and institution of granulocyte colony-stimulating factor and broad-spectrum antibiotics. Therapy with bepridil should be administered cautiously in patients with preexisting neutropenia or agranulocytosis. The drug should be withdrawn promptly if these conditions develop during therapy.

Post MI Syndrome

Major:

bepridil

Bepridil has a major potential interaction with Post MI Syndrome.

Bepridil has class I antiarrhythmic properties and can induce new arrhythmias, including ventricular tachycardia and ventricular fibrillation. In the National Heart, Lung, and Blood Institute's Cardiac Arrhythmia Suppression Trial involving patients with asymptomatic, non-life-threatening ventricular arrhythmias who have had myocardial infarctions for less than two years previously, an excess rate of mortality/nonfatal cardiac arrest was seen in patients treated with the class I antiarrhythmic agents, encainide and flecainide, compared with that seen in patients assigned to matched placebo-treated groups. Although the applicability of these results to other antiarrhythmic agents is uncertain, the manufacturer recommends generally avoiding the use of bepridil in the post-infarction period. There is also limited experience in the use of bepridil within three months following a myocardial infarction, since it was one of the exclusion criteria in U.S. clinical trials.

Renal Dysfunction

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with Renal Dysfunction.

Enzalutamide has not been assessed in patients with severe renal impairment or end-stage renal disease. Caution is advised if used on these patients. No initial dosage adjustment is required on patients with mild to moderate renal impairment.

Seizures

Moderate:

enzalutamide

Enzalutamide has a moderate potential interaction with Seizures.

Seizures occurred in 0.5% of patients receiving enzalutamide in clinical trials. Patients with predisposing factors for seizures were generally excluded. Caution is advised if using in patients with possible predisposing factors such as history of seizures, history of trauma or head injury, cerebrovascular accident or transient ischemic attack, Alzheimer's disease, meningioma or brain tumor or infection, and any unexplained loss of consciousness in the past 12 months. Enzalutamide should be discontinued permanently in any patient who develops a seizure during treatment.

Sinus Node Dysfunction

Major:

bepridil

Bepridil has a major potential interaction with Sinus Node Dysfunction.

The use of some calcium channel blockers (CCBs) is contraindicated in patients with severe bradyarrhythmia, sick sinus syndrome (unless a functioning pacemaker is present), or heart block greater than the first degree (unless a functioning pacemaker is present). CCBs like bepridil, diltiazem and verapamil have a negative effect on AV conduction and the SA node and may exacerbate these conditions.

Tachyarrhythmia

Major:

bepridil

Bepridil has a major potential interaction with Tachyarrhythmia.

The use of bepridil is contraindicated in patients with a history of serious ventricular arrhythmias; patients with congenital or acquired QT interval prolongation syndromes; and patients treated concomitantly with class IA or III antiarrhythmic drugs or other medications that are known to produce increases in the QT interval or cause torsade de pointes. Bepridil has class I antiarrhythmic properties and can induce new arrhythmias, including ventricular tachycardia and ventricular fibrillation. Patients with other severe arrhythmias may have increased susceptibility to the proarrhythmic effects of bepridil, but use in such patients has been limited. Bepridil can also cause torsade de pointes type ventricular tachycardia secondary to its ability to prolong the QT interval. In U.S. clinical trials, the mean prolongations of QTc and QT were 8% and 10%, respectively, but increases of 25% or more occurred in 5% of the studied population for QTc and 8.7% for QT. Although the absolute safe upper limit of QT is not known, the manufacturer recommends that the dosage be reduced in patients whose QT interval exceeds 0.52 seconds during treatment. If prolongation remains excessive, the drug should be discontinued.

More resources

bepridil

A total of 637 drugs are known to interact with bepridil.

enzalutamide

A total of 703 drugs are known to interact with enzalutamide.

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.