Common side effects of clarithromycin include diarrhea, nausea, vomiting, headache and changes in taste, according to WebMD. More serious side effects that may require medical attention include hearing loss, slurred speech, muscle weakness, yellow eyes or skin, and severe abdominal pain with or without vomiting.
Clarithromycin is a macrolide antibiotic used to treat bacterial infections in the body, explains Drugs.com. It is commonly prescribed to treat skin or respiratory infections. In addition, when used with other medications, it can be used to treat ulcers caused by Helicobacter pylori bacteria. Clarithromycin is available in two forms: as extended-release tablets or a liquid oral suspension.