3-(Aminomethyl)-5-methylhexanoic acid, commonly known as pregabalin, is an active pharmaceutical ingredient used in the treatment of neurological disorders including epilepsy, neuropathic pain, fibromyalgia, and generalized anxiety disorder. As a GABA analog, it binds to the α2δ subunit of voltage-dependent calcium channels in the central nervous system, reducing neurotransmitter release and providing therapeutic effects. It is also utilized in pharmaceutical research and as an intermediate for synthesizing related bioactive compounds with improved efficacy and safety for CNS applications.