Neuropathic Pain: Relief from nerve pain caused by diabetes (diabetic neuropathy), shingles (post-herpetic neuralgia), or spinal cord injury. Fibromyalgia: Managing widespread muscle pain, stiffness, and fatigue. Generalized Anxiety Disorder (GAD): In some regions, it is prescribed to treat chronic anxiety. Partial Onset Seizures: Used as an "add-on" therapy for adults with epilepsy.

It works by binding to the alpha-2-delta ($\alpha_2\delta$) subunit of voltage-gated calcium channels in the central nervous system. By doing this, it reduces the release of several excitatory neurotransmitters (like glutamate and substance P). Essentially, it acts like a "volume knob," turning down the intensity of pain signals being sent to the brain.

Common: Dizziness, sleepiness, and dry mouth. Physical: Blurred vision, weight gain, and peripheral edema (swelling of the hands, legs, or feet). Cognitive: Difficulty concentrating, "brain fog," or memory problems. Mood: In some cases, it may cause euphoria or, conversely, increased anxiety.