Used primarily in the prevention of migraine headaches, this compound acts as a serotonin and histamine receptor antagonist. It helps reduce the frequency and severity of migraine attacks when taken regularly. It is also prescribed for the management of recurrent cluster headaches in some patients. Additionally, it has been used off-label to manage symptoms of chronic urticaria and certain types of appetite stimulation due to its effect on central nervous system pathways. Its sedative properties may aid patients with sleep disturbances related to headache disorders.