Doxycycline
What It Is Used For
Doxycycline is a tetracycline antibiotic. It treats chest infections, acne and rosacea, some sexually transmitted infections, leptospirosis, scrub typhus, cholera and other infections, and it is used to prevent malaria when travelling to some areas.
How to Take It
Adults: commonly 200 mg on the first day, then 100 mg once or twice a day, as prescribed. Swallow with a full glass of water while sitting or standing, and do not lie down for 30 minutes; do not take it just before bed. It can be taken with food to reduce stomach upset. Keep 2 to 3 hours away from milk, antacids, and calcium, iron or zinc supplements. Finish the full course even if you feel better. Only take antibiotics prescribed for you; misuse makes bacteria resistant.
Who Should Not Take It
Do not take it if you are allergic to tetracyclines, are pregnant or breastfeeding. It is not usually given to children under 8, as it can stain growing teeth.
Side Effects
Common: nausea, stomach upset, diarrhoea, and sunburn more easily. If not swallowed with enough water it can cause painful ulcers in the food pipe. Rarely: severe headache with blurred vision, liver problems, or severe diarrhoea.
Precautions
Avoid strong sunlight and use sun protection. Tell your doctor if you have liver disease or myasthenia gravis.
Pregnancy and Breastfeeding
Do not take it during pregnancy or breastfeeding.
Interactions
Antacids, iron, calcium, zinc and magnesium reduce absorption. It can increase the effect of warfarin. Do not combine with isotretinoin. Phenytoin, carbamazepine and rifampicin can make it less effective.
Storage
Store below 30°C in a dry place, out of the reach of children.
Checked by the Oshud Alo pharmacy team. For information only; follow your doctor's advice.
All brands of Doxycycline