Pharmacology Which of the following anti-HIV drug should never be given as re–challenge once history of producing allergic reaction with drug is known ? A Lamivudine B Abacavir C Zidovudine D Nelfinavir 💡 Explanation Which of the following anti-HIV drug should never be given as re–challenge once history of producing allergic reaction with drug is known ? ✓ Correct Answer: B. Abacavir