system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Anti-HIV drug combination that should not be used
assistant
The correct answer is  Anti-HIV drug combinations that should NOT be used are:

Zidovudine + Stavudine: Pharmacological antagonism (compete for intracellular phosphorylation)
Atazanavir + Indinavir: Additive unconjugated hyperbilirubinemia.
Didanosine/stavudine + Zalcitabine: Additive peripheral neuropathy.
Lamivudine + Zalcitabine: In vitro antagonism.