Erzin 500 mg (as stearate) tablet. A macrolide antibiotic used as an alternative to penicillin for respiratory, skin, and eye infections, particularly in penicillin-allergic patients. Covered under the PhilHealth GAMOT Anti-infectious benefit and dispensed free of charge to active PhilHealth members by TrueMed, an accredited PhilHealth GAMOT Facility. Brand: Erzin.