just like many antibiotics clarithromycin can cause upset stomach nausea vomiting and diarrhea. however there isn’t any contraindication regarding a history of ulcers when taking this medication. if you are taking any ulcer medications it would be important to check with your pharmacist to make sure there aren’t any drug interactions that would decrease the effectiveness of your ulcer medication which would cause flare-ups. the medication can be taken with or without food. if the upset stomach is present try taking it with food to see if it subsides. if at any point it worsens you should consult your health-care provider to see if another medication is better for you.
can taking clarithromycin 500 mg make my ulcer pain worse?