Question: doxycycline how long should i take?
Answer: If you take it twice a day, this could be first thing in the morning, and in the evening. For preventing malaria, you'll take 100mg once a day, usually in the morning. You should start taking doxycycline 1 or 2 days before going to an area where there is malaria. Carry on for 4 weeks after leaving the area.