Welcome to our verapamil information (part 2) -- just click to return to front page.

Or click here for clinical trials research information on verapamil.

What are the possible side effects of verapamil?

• If you experience any of the following serious side effects, stop taking verapamil and contact your doctor immediately or seek emergency medical treatment:
• an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
• an unusually fast or slow heartbeat;
• shortness of breath (heart failure);
• fainting;
• abnormal behavior or psychosis;
• jaundice (yellowing of the skin or eyes); or
• swelling of the legs or ankles.
• Other, less serious side effects may be more likely to occur. Continue to take verapamil and talk to your doctor if you experience
• unusual headache, fatigue, or tiredness;
• insomnia or trouble sleeping;
• vivid dreams;
• hair loss;
• nausea or diarrhea; or
• increased urination.
• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect verapamil?

• Before taking this medication, tell your doctor if you are taking any of the following drugs:
• cyclosporine (Sandimmune, Neoral);
• cimetidine (Tagamet, Tagamet HB);
• carbamazepine (Tegretol, Carbatrol);
• lithium (Lithobid, Eskalith, others);
• theophylline (Theo-Dur, Theochron, Theolair, Theobid, Elixophyllin, Slo-Phyllin, others);
• rifampin (Rifadin, Rimactane);
• phenobarbital (Luminal, Solfoton);
• an HMG CoA reductase inhibitor such as atorvastatin (Lipitor), lovastatin (Mevacor), simvastatin (Zocor), and others; or
• another heart medication such as propranolol (Inderal), metoprolol (Lopressor, Toprol XL), atenolol (Tenormin), digoxin (Lanoxin), quinidine (Quinora, Quinidex, Quinaglute), flecainide (Tambocor), disopyramide (Norpace), captopril (Capoten), enalapril (Vasotec), and others.
• You may not be able to take verapamil, or you may require a dosage adjustment or special monitoring if you are taking any of the medicines listed above.
• Drugs other than those listed here may also interact with verapamil or affect your condition. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products.

Where can I get more information?

• Your pharmacist has additional information about verapamil written for health professionals that you may read.
• 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.

Limitations and the Source of Our Online Medication Information Database

Although we have made considerable efforts to ensure that the information provided here is accurate, up-to-date, and complete, MedLibrary.org makes no guarantee to that effect. Drug information contained herein may be time sensitive. This medication information does not endorse drugs, diagnose patients or recommend any specific pharmacotherapy. This is an educational resource only -- intended to supplement but not to replace the expertise, skill, knowledge and judgment of medically qualified 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. 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, please check with your doctor, nurse or local pharmacist. MedLibrary.org does not assume any responsibility for any aspect of healthcare administered with the aid of information provided here.

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Version: 7.01. Revision date: 7/15/03.