Antibiotics Home > Rifadin Dosage

Rifadin can be taken by mouth as capsules or given as an injection. The capsules can also be mixed into a liquid form of the medication for those who have trouble swallowing the capsules, such as children. The Rifadin dosage your healthcare provider recommends will depend on your weight, the reason you are taking it, and various other factors.

An Introduction to Dosing With Rifadin

The dose of Rifadin® (rifampin) your healthcare provider recommends will vary, depending on several factors, including:
  • Your weight
  • The reason you are using it
  • How you respond to it.
As is always the case, do not adjust your dosage unless your healthcare provider specifically tells you to do so.

What Is the Recommended Rifadin Dosage for Treating Tuberculosis?

The usual recommended dose of Rifadin for treating tuberculosis in adults is 10 mg per kg of body weight (about 4.54 mg per lb) daily. For children, the usual recommended dosage is 10 to 20 mg per kg (about 4.54 to 9.09 mg per lb) daily. The maximum recommended dose in adults and children is Rifadin 600 mg a day.
When Rifadin is taken by mouth in capsule form, it is usually taken once a day. Rifadin injection is given once a day, over a period of 30 minutes to 3 hours.
Rifadin is usually given in combination with other tuberculosis medications. Most people are treated for at least six months. Your healthcare provider will determine how long you need treatment. Longer treatment may be necessary if Mycobacterium tuberculosis (the bacteria that causes tuberculosis) is still detected in the body after six months, if the bacteria are resistant to tuberculosis medications, or in people with a human immunodeficiency virus (HIV) infection.

Rifadin Dose for Meningococcal Carriers

The usual recommended dose of Rifadin for people who have meningococcal bacteria in their nose and throat without symptoms (known as meningococcal carriers) is as follows:
  • For adults, the usual dose is 600 mg twice a day for two days
  • For children one month of age and older, the usual dose is 10 mg per kg body weight (about 4.54 mg per lb) twice a day, to a maximum of 600 mg per dose
  • For children under one month of age, the usual dose is 5 mg per kg body weight (about 2.27 mg per lb) twice a day. 
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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