For more information, speak with your doctor or pharmacist. For medical guidance on side effects, call your doctor. Constipation, nausea, dizziness, fatigue, difficulty breathing, swelling, edema, rash, flushing, and low blood pressure, which is referred to medically as hypotension, are some of the more frequent side effects of verapamil. This is not an exhaustive list of side effects associated with verapamil. Verapamil has been known to have serious side effects when taken orally or intravenously. Take a look at the "Drug Precautions" section. Contact the FDA at 1-800-FDA-1088 to report side effects.
Ask your doctor or pharmacist for more information. Indinavir, nelfinavir, ritonavir, saquinavir, some HCV protease inhibitors (boceprevir, telaprevir), some azole antifungals (ketoconazole, itraconazole, posaconazole, voriconazole), conivaptan, delavirdine, and nefazodone medications that block the enzyme CYP3A4 such John's wort, and nimodipine (Nimotop) medications to treat high blood pressure such as vasodilators, angiotensin-converting enzyme inhibitors (ACEIs), diuretics, beta blockers, and angiotensin receptor blockers (ARBs) anti-arrhythmic (irregular heartbeat) medications such as disopyramide (Norpace), flecainide (Tambocor), and quinidine simvastatin (Zocor) atorvastatin (Lipitor) digoxin (Lanoxin) alcohol cimetidine (Tagamet) lithium carbamazepine (Equetro, Tegretol, Carbatrol) rifampin cyclosporine (Neoral, Sandimmune, Gengraf) theophylline telithromycin (Ketek) clonidine (Catapres) This is not a complete list of verapamil drug interactions. Inform your doctor about all of the medications you take, including vitamins, herbal supplements, prescription and non-prescription drugs.
You may feel more lightheaded after consuming alcohol or cannabis. Inform your surgeon or dentist of everything you use, including prescription, over-the-counter, and herbal products. Before taking verapamil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. Before taking this medication, consult your doctor or pharmacist about your medical history, especially of: heart failure, certain muscle/nerve disorders (muscular dystrophy, myasthenia gravis), liver disease, and kidney disease. Also mention any pacemaker use, sick sinus syndrome, Wolff-Parkinson-White syndrome, or Lown-Ganong-Levine syndrome. Before breastfeeding, consult a doctor. Describe the advantages and disadvantages to your doctor. Till you can do it safely, avoid operating machinery, driving, or doing anything else that requires alertness. During pregnancy, this medication should be used only when clearly needed. Don't drink too much alcohol. Elderly people may be more sensitive to this medication's side effects, particularly constipation or swollen ankles or feet. If you use marijuana (cannabis), consult your physician. Get more information by speaking with your pharmacist. You may experience lightheadedness after taking this medication. Despite passing into breast milk, this medication is unlikely to harm a nursing baby. Inactive ingredients in this product could result in allergic reactions or other issues.