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Pharmacy and Medications

Antibiotic Group



Hi guy, how many antibiotic groups are there? I found a new medicine call Pyostacine and it belongs to the group of Streptogramin and I have never heard of this group. Is it a new group of antibiotic?


Pyostacine is a brand of the antibacterial combination drug containing Quinupristin and Dalfopristin.   The brand name of the product in the United States is Synercid.

This antibiotic is reserved for treatment of life-threatening infections caused by bacteria that are resistant to the standard antibiotic drugs.

This drug belongs to a relatively new class of antibiotics called Streptogramins.

There are numerous classes or groups of antibiotics.   The link below offers additional information on antibiotics as well as antibiotic drug resistance.

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Response by:

Carmen M Hadley, RPh, CSPI
Former Clinical Instructor
College of Pharmacy
The Ohio State University