Learn about common HIV medications and their uses in managing human immunodeficiency virus infection. Antiretroviral therapy helps control HIV by preventing the virus from multiplying in the body. Different medications work through specific mechanisms, including blocking viral enzymes or preventing the virus from entering immune cells. Treatment plans generally combine multiple medicines.
HIV medications work by interfering with the virus's ability to reproduce or infect additional cells. Healthcare professionals select treatment regimens according to clinical guidelines, individual health conditions, previous treatment experience, possible drug interactions, and resistance testing when appropriate. Many initial treatment regimens contain an integrase strand transfer inhibitor combined with two other antiretroviral medicines.
Common HIV medication classes and examples include:
Integrase strand transfer inhibitors (INSTIs): Dolutegravir, bictegravir, and raltegravir block an enzyme HIV uses to integrate its genetic material into human cells.
Nucleoside and nucleotide reverse transcriptase inhibitors (NRTIs): Tenofovir, emtricitabine, and lamivudine interfere with reverse transcriptase, an enzyme HIV needs to reproduce.
Non-nucleoside reverse transcriptase inhibitors (NNRTIs): Doravirine and rilpivirine inhibit reverse transcriptase through a different mechanism.
Protease inhibitors (PIs): Darunavir prevents the virus from producing mature, infectious particles by blocking the HIV protease enzyme.
Entry and attachment inhibitors: Maraviroc and fostemsavir interfere with specific processes HIV uses to enter susceptible immune cells. Their use depends on factors such as viral characteristics and treatment history.
Some medicines are available as single drugs, while others are combined into one tablet to simplify daily treatment. Examples of combination treatments include bictegravir, tenofovir alafenamide, and emtricitabine, as well as dolutegravir combined with lamivudine for appropriately selected patients.
The primary purpose of HIV treatment is to suppress viral replication, preserve immune function, reduce the risk of HIV-related complications, and prevent transmission through sex when viral suppression is maintained. The specific medication combination depends on each person's circumstances. Treatment may also need adjustment when side effects occur, drug resistance is identified, other medicines cause interactions, or particular health conditions affect medication selection.
Important considerations when using HIV medications include:
Taking medication consistently: Following the prescribed schedule helps maintain viral suppression and reduces the risk of drug resistance.
Monitoring viral load: Blood tests measure the amount of HIV in the bloodstream and help determine whether treatment is working.
Checking CD4 counts: These tests assess immune function and help healthcare professionals evaluate the risk of certain infections.
Understanding side effects: Depending on the medicine, possible effects include nausea, headache, sleep disturbances, or changes in kidney, liver, or metabolic measurements.
Reviewing drug interactions: Prescription medicines, over-the-counter products, supplements, and herbal remedies can affect HIV treatment.
Discussing treatment changes: Medication should not be stopped or changed without medical guidance because interruptions can allow the virus to multiply.
Long-acting injectable treatments are also available for selected individuals who meet specific clinical criteria. These options may reduce the need for daily oral medication, but they require scheduled injections and appropriate follow-up.
HIV medications are prescribed and monitored by qualified healthcare professionals. Individuals receiving treatment should attend follow-up appointments and discuss new symptoms, missed doses, pregnancy plans, or other medical conditions with their care team. With appropriate treatment and ongoing monitoring, HIV can generally be managed as a chronic health condition, helping people maintain their health and quality of life.