Erythromycin allergy. what are alternatives?

Excellent choices: But it depends on the bacteria being treated. For streptococcal tonsillitis penicillin & Amoxicillin are excellent choices. Your physician will make the appropriate choice based upon (1) any other antibiotic allergies or intolerances that you have (2) the infection being treated and (3) potential interactions with other drugs that you take for other conditions.