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Doxycycline 100mg dosage


For more severe infections, up to 2 milligrams per pound of body weight may be used.

For children above 8 years of age, the recommended dosage schedule for those weighing 100 pounds or less is 2 milligrams per pound of body weight, divided into 2 doses, on the first day of treatment, followed by 1 milligram per pound of body weight given as a single daily dose or divided into 2 doses on subsequent days.

For prevention of malaria, the recommended dose is 2 milligrams per 2.2 pounds of body weight up to 100 milligrams.

For inhalational anthrax in children weighing less than 100 pounds, the usual dose is 1 milligram per pound of body weight twice daily for 60 days.

For children over 100 pounds, the usual adult dose should be used.


The usual dose of oral Doxycycline is 200 milligrams on the first day of treatment (100 milligrams every 12 hours) followed by a maintenance dose of 100 milligrams per day.

Your doctor may prescribe 100 milligrams every 12 hours for severe infections such as chronic urinary tract infection.

The maintenance dose may be taken as a single dose or as 50 milligrams every 12 hours.

For Primary and Secondary Syphilis

The usual dose is 200 milligrams a day, divided into smaller, equal doses for 14 days.

For Uncomplicated Gonorrhea (Except Anorectal Infections in Men)

The usual dose is 100 milligrams by mouth, twice a day for 7 days. An alternate, single-day treatment is 300 milligrams, followed in 1 hour by a second 300-milligram dose.

For Prevention of Malaria

The usual dose is 100 milligrams a day. Treatment should begin 1 to 2 days before travel to the area where malaria is found, then continue daily during travel in the area and 4 weeks after leaving.

For Inhalational Anthrax

To prevent or combat infection after exposure, the usual dose is 100 milligrams taken by mouth twice a day for 60 days. Treatment can be started intravenously, but should be switched to oral doses as soon as possible.

Doxycycline 100mg Overdose

Any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical treatment immediately.


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