The tetracyclines are broad-spectrum antibiotics with similar antimicrobial features, but they differ somewhat from one another in terms of their spectra and pharmacokinetic.

 

CLASSES

1-  Naturally occurring tetracyclines (oxytetracycline, chlortetracycline, and demethylchlortetracycline) and

Semisynthetically (tetracycline, rolitetracycline, methacycline, minocycline, doxycycline, lymecycline, etc).