Medical Wellness Center Periostat  STOPS the progression of periodontal disease Warning: Do NOT take Periostat if you are Pregnant or breast feeding!  Do NOT take Periostat if you are allergic to DOXYCYCLINE and other common antibiotics!  Do NOT take Periostat if you are taking blood thinning medication  Warning:  Periostat may make birth control pills less effective. IF ON THE PILL USE ADDITIONAL FORM OF CONTRACEPTION WHILE ON PERIOSTAT