- Ganciclovir (DHPG). Pyrimethamine. Clindamycin. Sulfadiazine. Folinic acid. Prednisone. Intravenous gamma globulin. Intravenous acyclovir. Interferon. Systemic corticosteroids. Non-steroidal anti-inflammatory drugs (NSAIDs). Known immunomodulatory agents. Dideoxycytosine. Dideoxyinosine. Nucleoside analogs (with the exception of zidovudine or topical acyclovir). Any experimental therapy.