Glatiramer acetate is primarily used in the treatment of multiple sclerosis (MS), specifically the relapsing-remitting form of the disease. It works by modulating the immune system to reduce the frequency of relapses. The drug is believed to act as a decoy, diverting immune cells away from attacking the myelin sheath that protects nerve fibers in the central nervous system. This helps to slow the progression of disability and manage symptoms associated with MS. It is administered via subcutaneous injection, typically on a daily or multiple-times-per-week schedule, depending on the prescribed dosage. Glatiramer acetate is often chosen for its favorable safety profile and is considered a first-line therapy for many patients with MS.