This invention relates to a composition comprising an anti-HIV treatment and a treatment for side effects of said anti-HIV treatment in an HIV-infected patient. This invention is, for example, very useful in the treatment of side effects caused by certain anti-HIV treatments, for example premature aging and lipodystrophy, which can be caused by protease inhibitors or reverse transcriptase inhibitors. The composition of this invention includes at least one hydroxymethylglutaryl-coenzyme A (HMG-CoA) reductase inhibitor, at least one farnesyl-pyrophosphate synthase inhibitor, and at least one anti-HIV agent. One of the processes for treating an HIV-infected patient includes, in any order, the following steps: (i) administration of a mixture including at least one hydroxymethylglutaryl-coenzyme A (HMG-CoA) reductase inhibitor and at least one farnesyl-pyrophosphate synthase inhibitor and (ii) administration of an anti-HIV agent, in which the administrations are concomitant, successive or alternative.