Reverse transcriptase is the enzyme that the virus uses to make this new DNA. Use Zidovudine on regular schedule around the clock, unless otherwise directed by your doctor. RETROVIR Tablets 300 mg biconvex, white, round, film-coated containing 300 mg zidovudine, one side engraved GX CW3 and 300 on the other side. Dosage The lowest effective dose of Retrovir has not zidovudine kopa online i lager been determined, and the currently recommended dose is 300-600 mg per day. Observed During Clinical Practice In addition to adverse events reported from clinical trials, the following events have been identified during use of Zidovudine in clinical practice. RETROVIR Syrup should be used to provide accurate dosage when whole tablets or capsules are not appropriate. The doses in mice were reduced to 20, 30, and 40 mg kg day after day 90 because of treatment-related anemia, whereas in rats only the high dose was reduced to 450 mg kg day on day 91 and then to 300 mg kg day on day 279.