How does Periostat / Doxycycline work?
The FDA approved drug Doxycycline works by inhibiting the activity of collagenase in the cell walls of bacteria. This effect stops the bacteria from multiplying and spreading. In other words, Periostat acts as an antibacterial treatment. News reports put Doxycycline among the milder tetracycline drugs, which means it cannot be used to fight widespread bacterial infection in the body.