Viread 300mg Tablet is used to treat HIV infection and chronic hepatitis B virus (HBV) infection in combination with other anti-HIV medicines. It prevents the multiplication of viruses in human cells. This stops the virus from producing new viruses and clears up your infection. Viread 300mg Tablet is not a cure for HIV/AIDS and only helps to decrease the amount of HIV in your body. This helps to lower your risk of getting HIV-related complications and improves your lifespan. It may also be used to prevent HIV infection in some people at high risk. This medicine is best taken with food. It is used in combination with other anti-HIV medicines. Taking these medicines regularly at the right time greatly increases their effectiveness and reduces the chances of HIV becoming resistant to them. It is important not to miss doses and to keep taking them until your doctor tells you it is safe to stop. Common side effects of this medicine include nausea, vomiting, diarrhea, flatulence, trouble sleeping, headache, and rash. These are usually not serious but inform your doctor if they bother you or will not go away. It can also increase the risk of bone loss (osteoporosis) if you take it for a long time. Exercise regularly and take calcium and vitamin D supplements as suggested by your doctor. Some people may put on weight while taking medicines to treat HIV/AIDS. Before taking it, tell your doctor if you have any liver or kidney disease or bone problems. While taking it, you may need regular blood tests to check your blood counts, liver function, and kidney function. Since this medicine may cause dizziness or sleepiness, do not drive until you know how it affects you. Pregnant or breastfeeding mothers should consult their doctor before using this medicine. Do not have unprotected sex or share personal items like razors or toothbrushes, if you are HIV positive. Talk to your doctor about safe ways like condoms to prevent HIV transmission during sex.