Oral antibiotics have been long term used frequently to treat acne, it can kill Propionibacterium acnes, an anaerobic bacteria that caused continuous inflammatory response, thus work efficiently on pustules and papules.
Antibiotics work by several mechanisms. The most important is the decrease in the number of bacteria in and around the follicle. Antibiotics also work by reducing the irritating chemicals produced by white blood cells. Finally, antibiotics reduce the concentration of free fatty acids in the sebum, also reducing the inflammatory response.
Antibiotics take usually 3-4 weeks & above to work on acne treatment, physicians/dermatologists will adjust the concentration/dosage of antibiotics according to skin conditions. After stop taking antibiotics, we could still continue acne treatment with topical acne cream and AHA products.
tetracycline, erythromycin, minocycline, doxycycline, clindamycin
All antibiotics can cause candida vaginal yeast infections in women. Tetracycline seems to be the antibiotic that most frequently has this side effect. All oral antibiotics can also lessen the effectiveness of birth control pills.