How do you get prescribed doxycycline?

Dosing

  1. Adults—100 milligrams (mg) every 12 hours on the first day, then 100 mg once a day or 50 to 100 mg every 12 hours.
  2. Children 8 years of age or older weighing 45 kilograms (kg) or more—100 mg every 12 hours on the first day, then 100 mg once a day or 50 to 100 mg every 12 hours.

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