<prompt> Anti retro viral drug causing urinary stones:ZidovudineLamivudineIndinavirNelfinavir  <response>: Ans: c Indinavir Ref: Harrison, 16th ed, p. 1127; 17th ed, p. 1192Indinavir is the antiretroviral drug which causes urinary stones.Classification of antiretro viral drugNucleoside reverse transcriptase inhibitors NRTI Zalcitabine Didanosine Lamivudine Zidovudine Stavudine Abacavir EmtricitabineProtease inhibitors Indinavir Saquinavir Ritonavir Nelfinavir LopinavirFusion inhibitorsEnliiviritideNon nucleoside reverse transcriptase inhibitors NNRTI Nevirapine Efavirenz DelavirdineNucleotide analogueTenefovirAdefbvirSide effects of antiretroviral drugsNRTIPeripheral neuropathy-Stavudine Zalcitabine DidanosinePancreatitis-Didanosine Zalcitabine StavudineHepatic steatosisAnaemia neutropeniaProtease InhibitorsGastro intestinal intoleranceFat redistributionHyperlipidaemiaInsulin resistanceIndinavir-Renal stones, crystalluria, hyperbilirubinaemiaRitonavir-Perioral paraesthesiaMyopathyZalcitabine-mouth ulcersZidovudine-nail pigmentationAbacavir-Hypersensitivity.NNRTIRashSteven Johnson syndromeEfavirenz-vivid dreamsNevirapine-hepatitisFusion inhibitors-hypersensitivity. 