<prompt> Lamivudine acts at which of the following enzymes?DNA polymeraseReverse transcriptaseBoth of the aboveNone of the above  <response>: Lamivudine inhibits HBV DNA polymerase and HIV reverse transcriptase by competing with deoxycytidine triphosphate for incorporation into the viral DNA, resulting in chain termination. Lamivudine achieves 3-4 log decreases in viral replication in most patients and suppression of HBV DNA to undetectable levels in about 44 of patients. Ref: Katzung 11th edition Chapter 49. 