The best way to prevent PCP is to use strong antiretroviral therapy (ART). People who have less than 200 CD4 cells can prevent PCP by taking the same medications used for PCP treatment.

  1. Combination ART can make your CD4 cell count go up. If it goes over 200 and stays there for 3 months, it may be safe to stop taking PCP medications.
  2. However, because PCP medications are inexpensive and have mild side effects, some researchers think they should be continued until your CD4 cell count reaches 300.