Doxycycline, like many antibiotics, can cause certain side effects ... adults will take 200 milligrams (mg) on the first day ...

The updated prescription information on Doxycycline provides an overview of possible side effects ... by a maintenance dose of 100 mg/day. Child: The recommended dosage is 2 mg/lb of body weight ...

Although this drug is commonly used for the treatment of acne vulgaris, no large studies have been conducted on the safety of doxycycline. However, several side effects ... (100 mg/d) for malaria ...