Is erythromycin a penicillin?

No. Erythromycin is often used as an alternative to penicillin, especially in people who are allergic to penicillin.

Yes. You can't take amoxcillin or augmentin.

erythromycin are prescribed for numerous infections and are used when allergic to penicillin

no

Although some in vitro data indicate synergism between macrolide antibiotics and penicillins, other in vitro data indicate antagonism. When these drugs are given together, neither has predictable...