Pre-Exposure Prophylaxis, often called PrEP, is a preventive medication for individuals at high risk of contracting HIV. When taken consistently, it significantly reduces the chances of getting HIV from sexual activity or injection drug use. PrEP is typically prescribed as a daily pill, and it works by blocking the virus's ability to establish an infection in the body. Regular medical check-ups and testing are essential while on PrEP to ensure its effectiveness and monitor overall health.