Is erythromycin a tetracycline antibiotic agent?

Yes. It's often used for people who are allergic to penicillin.

yes! gram (+)

Antibiotics are effective against bacteria, usually by breaking down the cell wall. These are given to ward off infection after surgery or injury, or for diseases like TB that are caused by bacteria....

B- Bacteria

I found this online: "FSRH guidance now no longer advises that additional precautions are required to maintain contraceptive efficacy when using antibiotics that are not enzyme inducers with combined...