No clarithromycin will not affect any other pill. Have a bad tooth abcess in alot of pain is clarithromycin strong enough to get rid of abcess. Hello, Welcome Thanks for consulting HCM, I have gone through your query tooth abscess doesnt heal by taking antibiotics.ello One of the less common side effects of the antibiotic Clarithromycin is hoarseness. This side effect can also be caused by Prednisilone. If a person with Asthma is taking both these medications ...