Bacteria on the skin feed off this excess oil, called sebum, blocking the pores and
leading to inflammed spots.
If oxytetracycline and doxycycline
didn't work other antibiotics may help; lymecycline, erythromycin or minocycline. Alternatively, topical antibiotics (clindamycin, erythromycin) or topical retinoids (tretinoin, adapalene) may work.
Female acne patients can take an anti-androgen medicine called Spironolactone and/or an anti-androgen contraceptive pill such as Diane35 or Yasmin/Yaz.