Doxycycline is an antibiotic that can be used to treat acne. As part of a group of antibiotics called tetracyclines, it helps treat acne by reducing bacteria on pores and by calming inflammation.

Doxycycline can lower the risk of getting certain STIs by two-thirds, according to the NYC Department of Health.

Relative to high-dose doxycycline, low-dose doxycycline is comparably effective but more tolerable for lymphocytic scarring alopecias.

Lower doses of a common antibiotic can curb hair loss caused by a rare skin condition, a new study says. The antibiotic doxycycline is commonly used to treat lymphocytic scarring alopecia, a ...