Mayne Pharma Commercial LlcUsage: Doryx MPC (doxycycline hyclate) is a tetracycline antibiotic indicated for rickettsial, sexually transmitted, respiratory, and specific bacterial infections; ophthalmic infections; anthrax (including post-exposure inhalational anthrax); malaria prophylaxis; and adjunctive therapy for acute intestinal amebiasis and severe acne.