Find out if this commonly prescribed antibiotic is right for you Medically reviewed by William Truswell, MD Doxycycline is an ...

then 10 days of oral doxycycline (100 mg twice daily); 10-day doxycycline alone; or 20-day doxycycline alone. At 20 days and at 3, 12, and 30 months, the 3 groups did not differ significantly from ...