For the prevention PCP infection, the usual dosage of dapsone is 100mg daily. However, the dosage of dapsone may vary when used in combination with other drugs. Dapsone is taken for an indefinite period of time for PCP prevention. Dapsone remains in your system for a long period of time because it is eliminated slowly. Consult your pharmacist in order to decide what would be most appropriate for you.
Dapsone can cause a variety of adverse effects most having to do with blood.
These effects are related to the amount of dapsone taken and to persons who may already be experiencing low red blood cell levels. Regular lab tests are important. Dapsone is however, generally well tolerated. Other adverse effects can include rash, nausea and vomiting but seldom require the stopping of treatment. If these effects occur and are bothersome, please call the clinic or discuss them at your next visit.