If any of the following apply to you: For medical guidance on side effects, contact your doctor. (More information) Clarithromycin side effects The following are typical side effects of clarithromycin: If you experience symptoms of an allergic reaction to clarithromycin, such as hives, difficulty breathing, swelling in your face or throat, or a severe skin reaction, such as fever, sore throat, burning in your eyes, skin pain, or a red or purple skin rash that spreads and results in blistering and peeling, seek emergency medical attention. If you've ever experienced heart issues, taking clarithromycin may result in a heart attack or stroke years later. A life-threatening fast heart rate and other heart rhythm side effects may be more common in older adults. If you experience sudden numbness or weakness on one side of your body, chest pain that radiates to your jaw or shoulder, difficulty breathing, slurred speech, or difficulty speaking, seek medical attention right away. There may be other side effects; this is not a comprehensive list. You can contact the FDA to report side effects at 1-800-FDA-1088. Symptoms of liver problems include fatigue, loss of appetite, upper stomach pain, dark urine, clay-colored stools, and jaundice (yellowing of the skin or eyes), while kidney problems include little to no urination, swelling in your feet or ankles, feeling exhausted or short of breath. stomach pain, nausea, vomiting; diarrhea; or unusual or unpleasant taste in your mouth.
Absorption is boosted by eating. Take with food.
Ask your pharmacist for a list of the ingredients and let your doctor know if you're taking cisapride (Propulsid; not available in the U.S.), colchicine (Colcrys, Mitigare), dihydroergotamine (D.H.E. 45, Migranal), ergotamine (Ergomar, in Cafergot, in Migergot), lomitapide (Juxtapid), lovastatin (in Ad Inform your doctor and pharmacist if you are allergic to clarithromycin, azithromycin (Zithromax, Zmax), erythromycin (E.E.S., Eryc, Erythrocin, PCE, and others), telithromycin (not sold in the United States; Ketek), any other medications, or any of the components found in clarithromycin preparations before taking clarithromycin. Inform your doctor if you have or have ever had jaundice (yellowing of the skin or eyes) or other liver problems while taking clarithromycin. If you are taking one or more of these medications, your doctor will likely advise you not to take clarithromycin. Inform your doctor and pharmacist of all prescription and non-prescription drugs, vitamins, dietary supplements, and herbal products you are currently taking or plan to take. Your doctor will likely advise you not to take clarithromycin.