Zerit contains stavudine which is a synthetic nucleoside analogue of thymidine. After penetration to a cell stavudine turns into its active metabolite stavudine triphosphate, which inhibits HIV reverse transcriptase competing with the natural substrate deoxythymidine triphosphate and impairs the replication of HIV. Stavudine triphosphate also increases viral DNA chain termination due to the absence in the molecule Z'-hydroxyl groups important for the construction of DNA. In addition, stavudine triphosphate suppresses cellular DNA polymerases β and γ and considerably reduces the synthesis of mitochondrial DNA. In combination with other nucleoside and non-nucleoside reverse transcriptase inhibitors and inhibitors of HIV protease Buy Zerit is used to treat HIV infections.

Suicide attempts and deaths have been reported in patients treated with Buy Symmetrel. Suicide attempts and ideations have been reported in patents with and without a history of psychiatric illness. Symmetrel can exacerbate symptoms in patients with a history of psychiatric disorders or substance abuse.

Risk of an enlarged liver and lactic acidosis increases during treatment with Retrovir especially overweight patients and those whose treatment continued for a rather extended period. If such condition develops treatment with Retrovir should be discontinued. Contact your doctor immediately if you experience such symptoms as fatigue, abdominal pain, nausea, feeling of unwellness.

Take Famvir with or without food. Take each dose with a glass of water. The recommended dose for treatment of recurrent genital herpes is 1,000 mg twice daily during one day. Recurrent cold sores should be treated by 1,500 mg taken as a single dose. To suppress recurrent genital herpes take 250 mg twice daily during 1 year. Treatment of shingles require 500 mg every eight hours for a week. In HIV-infected patients for treatment of cold sores and genital herpes 500 mg of Famvir is taken twice daily for 5-10 days. Do not take Famvir in larger amounts. Follow all recommendations of your doctor.

Combivir can affect the body's acid balance. It also can be a reason to low blood cell counts (anemia). Inform your doctor if you have an existing shortage of blood cells or a disease of the bone marrow before to start treatment with Combivir. Aggravation of chronic liver disease hepatitis B is possible when treatment with Combivir is finished as its virus causative agent becomes resistant to lamivudine. Combivir sometimes causes muscle pain and inflammation, especially inflammation of the pancreas (pancreatitis). If you have abdominal pain for several days, accompanied by nausea and vomiting yo should immediately check with your doctor. Drugs for HIV may cause a redistribution of body fat: (a "buffalo hump" on the back, extra fat around the middle, and wasting in the arms, legs, and face).