Definition
Zalcitabine is an antiretroviral medication previously used to treat HIV/AIDS. Known chemically as dideoxycytosine, it's an NRTI. It functioned by interfering with the HIV virus's ability to replicate by inhibiting reverse transcriptase. Now it has been superseded by better drugs. Think of it as a historical tool in the fight against HIV. Although effective, it came with noticeable side effects. It is now a part of medical history.