Renagel, known generically as sevelamer hydrochloride, is a phosphate binder medication primarily used to treat hyperphosphatemia (high blood phosphate levels) in patients with chronic kidney disease (CKD), especially those on dialysis. It works by binding to dietary phosphate in the gastrointestinal tract, thereby preventing its absorption into the bloodstream. This action helps manage and maintain appropriate phosphate levels in the body, which is crucial for patients with impaired kidney function, as high phosphate levels can lead to serious complications such as bone and cardiovascular diseases. Renagel is taken orally and is available in tablet form. It is important for patients to follow their healthcare provider's instructions regarding diet, dosage, and other medications to ensure the effectiveness of Renagel and to minimize potential side effects.