The use of the antiretroviral drug tenofovir has been associated with nephrotoxicity. However, the overall impact of this adverse effect has not been comprehensively evaluated. Some researchers have reported that it is quite severe to warrant monitoring for renal toxicity, while others have concluded that the magnitude may not be that significant. We report two clinical cases seen in our renal clinic with high creatinine levels suggestive of nephrotoxicity who reverted back to normality upon withdrawal of tenofovir.