ACT-709478 is primarily investigated for its potential therapeutic applications in the treatment of epilepsy and other seizure disorders. It functions as a selective T-type calcium channel blocker, which plays a crucial role in regulating neuronal excitability. By inhibiting these channels, it helps reduce abnormal electrical activity in the brain, thereby preventing seizures. Its targeted mechanism offers promise for patients with drug-resistant forms of epilepsy, potentially providing a more effective treatment option with fewer side effects compared to traditional anticonvulsants. Ongoing research aims to further explore its efficacy, safety, and potential use in other neurological conditions characterized by abnormal calcium channel activity.