Imepitoin

Imepitoin is a centrally acting antiepileptic drug primarily used in veterinary medicine for the management of idiopathic epilepsy in dogs, as well as for the treatment of noise phobia. Unlike traditional antiepileptics like phenobarbital, it has a lower risk of hepatotoxicity and does not typically induce liver enzymes to the same extent. **Clinical Pearl:** Imepitoin is often preferred for dogs with mild to moderate idiopathic epilepsy due to its favorable side effect profile, but it may not be sufficient as a monotherapy for severe or cluster seizures.

กลไกการออกฤทธิ์: Imepitoin inhibits seizures via potentiation of the **GABA_A** receptor-mediated inhibitory effects on the neurons. It acts as a low-affinity partial agonist at the benzodiazepine site of the GABA_A receptor → hyperpolarization of the neuronal membrane → decreased neuronal excitability. Imepitoin also has a weak **calcium-channel blocking effect**, which may contribute to its anticonvulsive properties.

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