Dapsone is a safe and effective alternative.
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.