Cabotegravir: A Comprehensive Guide for Patients

What is Cabotegravir?

Cabotegravir is a medication used in the treatment and prevention of Human Immunodeficiency Virus (HIV) infection. It's also known by its brand name Apretude and the abbreviations CAB or GSK1265744123. HIV is a virus that attacks the body's immune system, making it difficult to fight off infections and diseases.

How Cabotegravir Works

Cabotegravir belongs to a class of drugs called integrase strand-transfer inhibitors (INSTIs). These drugs work by blocking an enzyme called integrase, which the HIV virus needs to multiply in your body. By stopping the virus from reproducing, cabotegravir helps to lower the amount of HIV in your blood and prevent it from damaging your immune system2.

Uses of Cabotegravir

Cabotegravir is used for two main purposes:

1. HIV Treatment: It's used as part of a combination therapy to treat HIV infection in adults1.
2. HIV Prevention (PrEP): It's also used as a pre-exposure prophylaxis (PrEP) to prevent HIV infection in adults and adolescents who are at risk of getting HIV through sex5.

Forms and Administration

Cabotegravir comes in two main forms:

1. Oral tablets: These are usually used for a short period before starting the injectable form. They come in 30mg strength and are taken once daily37.
2. Long-acting injectable: This is the main form used for both treatment and prevention. It's given as an injection into the muscle of your buttocks by a healthcare professional. For HIV prevention, it's typically given once every two months after initial doses25.

Effectiveness

Clinical trials have shown cabotegravir to be highly effective:

• For HIV treatment, when used in combination with other antiretroviral drugs, it can significantly reduce the amount of HIV in the blood (viral load)1.
• For HIV prevention, studies have shown it to be more effective than daily oral PrEP pills. In one large study, it reduced the risk of getting HIV by 69% compared to daily oral PrEP2.

Safety and Side Effects

Cabotegravir is generally well-tolerated, but like all medications, it can cause side effects. Common side effects may include:

• Injection site reactions (pain, swelling, redness)
• Headache
• Fever
• Fatigue
• Muscle pain
• Nausea

Serious side effects are rare but can occur. These may include liver problems or allergic reactions. It's important to discuss all potential side effects with your healthcare provider3.

Special Considerations

There are some important things to consider when using cabotegravir:

• HIV Testing: Before starting cabotegravir for prevention, you must be tested to ensure you don't already have HIV5.
• Adherence: For the injectable form, it's crucial to stick to the scheduled injection appointments to maintain protection against HIV5.
• Drug Interactions: Cabotegravir may interact with other medications. Always inform your healthcare provider about all medicines you're taking3.
• Pregnancy: If you're pregnant or planning to become pregnant, discuss this with your doctor before using cabotegravir2.

Ongoing Research

Research on cabotegravir is ongoing to further understand its long-term effects and optimal use. Current studies are looking at:

• Its use in different populations, including young adults and transgender individuals25.
• Different formulations and dosing schedules6.
• Its effectiveness in real-world settings outside of clinical trials5.

Cabotegravir represents a significant advance in HIV treatment and prevention. Its long-acting formulation offers a convenient alternative to daily pills, which may improve adherence and effectiveness for some people. However, like all medical decisions, the choice to use cabotegravir should be made in consultation with a healthcare provider, taking into account individual circumstances and preferences.