verapamil (oral) (cont.)
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of verapamil can be fatal.
Overdose symptoms may include slow heartbeat and fainting.
What should I avoid while taking verapamil?
Verapamil may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.
Avoid getting up too fast from a sitting or lying position, or you may feel dizzy. Get up slowly and steady yourself to prevent a fall.
Drinking alcohol can further lower your blood pressure and may increase certain side effects of verapamil.
Grapefruit and grapefruit juice may interact with verapamil and lead to potentially dangerous effects. Discuss the use of grapefruit products with your doctor.
What other drugs will affect verapamil?
Many drugs can interact with verapamil. Below is just a partial list. Tell your doctor if you are using:
- buspirone (BuSpar);
- cimetidine (Tagamet);
- clonidine (Catapres, Clorpres, Kapvay, Nexiclon) or any other blood pressure medications;
- cyclosporine (Gengraf, Neoral, Sandimmune);
- digoxin (digitalis, Lanoxin, Lanoxicaps);
- lithium (Eskalith, LithoBid);
- lovastatin (Mevacor, Advicor) or simvastatin (Zocor, Simcor, Vytorin);
- theophylline (Elixophyllin, Theo-24, Uniphyl);
- an antibiotic such as clarithromycin (Biaxin), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin, Pediazole), rifampin (Rifadin, Rimactane, Rifater), or telithromycin (Ketek);
- an antifungal medication such as fluconazole (Diflucan), itraconazole (Sporanox), ketoconazole (Nizoral), or voriconazole (Vfend);
- a beta-blocker such as atenolol (Tenormin), bisoprolol (Zebeta, Ziac), metoprolol (Lopressor, Toprol), propranolol (Inderal, InnoPran), sotalol (Betapace), timolol (Blocadren), and others;
- cancer medicine such as cisplatin (Platinol), cyclophosphamide (Cytoxan, Neosar), doxorubicin (Adriamycin), paclitaxel (Taxol), procarbazine (Matulane), vincristine (Oncovin), or vinorelbine (Navelbine);
- a heart rhythm medication such as amiodarone (Cordarone, Pacerone), disopyramide (Norpace), flecainide (Tambocor), or quinidine (Quin-G);
- HIV/AIDS medicine such as atazanavir (Reyataz), delavirdine (Rescriptor), fosamprenavir (Lexiva), indinavir (Crixivan), nelfinavir (Viracept), or ritonavir (Norvir, Kaletra);
- a sedative such as midazolam (Versed) or triazolam (Halcion); or
- seizure medication such as carbamazepine (Carbatrol, Equetro, Tegretol) or phenobarbital (Solfoton).
This list is not complete and other drugs may interact with verapamil. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.
Where can I get more information?
Your pharmacist can provide more information about verapamil.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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