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Isoptin SR Patient Information including If I Miss a Dose
In this Article
- What is verapamil (Isoptin SR)?
- What are the possible side effects of verapamil?
- What is the most important information I should know about verapamil?
- What should I discuss with my healthcare provider before taking verapamil?
- How should I take verapamil?
- What happens if I miss a dose?
- What happens if I overdose?
- What should I avoid while taking verapamil?
- What other drugs will affect verapamil?
- Where can I get more information?
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);
- cholesterol-lowering drugs such as atorvastatin (Lipitor, Caduet), lovastatin (Mevacor, Altoprev, Advicor), or simvastatin (Zocor, Simcor, Vytorin, Juvisync);
- 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.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
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Additional Isoptin SR Information
- Isoptin SR Drug Interactions Center: verapamil oral
- Isoptin SR Side Effects Center
- Isoptin SR Overview including Precautions
- Isoptin SR FDA Approved Prescribing Information including Dosage
Isoptin SR - User Reviews
Isoptin SR User Reviews
Now you can gain knowledge and insight about a drug treatment with Patient Discussions.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Get tips on handling your hypertension.