<prompt> A doctor was accidentally exposed to HIV by a needle stick injury while sampling HIV positive patient. A drug prescribed to him would be -Zidovudine Lamivudine Indinavir for 4 weeksZidovudine Lamivudine Navirapine for 4 weeksZidovudine Stavudine for 4 weeksZidovudine Lamivudine for 4 weeks  <response>: Needlestick injury is the most common cause of HIV infection among health care workers.The guidelines for post-exposure prophylaxis of HIV are A For routine exposuresa combination of two nucleoside reverse transcriptase inhibitors for 4 weeks.B For high risk or complicated exposuresa combination of two nucleoside reverse transcriptase inhibitors plus a protease inhibitor for 4 weeks.Inspite of the guidelines regimen B is given for all types of exposureThus the treatment is obvious in this doctor.Also RememberExamples ofNucleoside reverse transcriptase inhibitorsZidovudineLamivudineStavudineDidanosineZalcitabineA bacavirProtease inhibitorsSaquinavirIndinavirRitonavirNelfinavirAmprenavir 