you could try and use Minocin ..Minoclyine its just another antibiotic which does work good ive uesd it before just incase my ance ever came back

Minocycline is also used to treat acne, as it is active against the bacteria associated with acne, Propionebacterium acnes. This is a common type of bacteria that feeds on sebum produced by the sebaceous glands in the skin. It produces waste products and fatty acids that irritate the sebaceous glands, making them inflamed and causing spots. By controlling bacterial numbers, minocycline brings the inflammation of the sebaceous glands under control, and allows the skin to heal.