Zeptol CR 200 mg is a controlled-release formulation of Carbamazepine, an anticonvulsant and mood-stabilizing drug used primarily in the treatment of epilepsy and bipolar disorder. It works by reducing abnormal electrical activity in the brain, helping to prevent seizures and stabilize mood. Zeptol CR is also used to manage trigeminal neuralgia, a condition causing severe facial nerve pain. The "CR" (controlled release) designation ensures that the medication is released slowly into the bloodstream, providing consistent therapeutic effects over time and reducing the frequency of dosing. It is typically prescribed under medical supervision, as it may cause side effects such as dizziness, drowsiness, nausea, or allergic reactions. Regular blood monitoring may be required to ensure safe and effective use.