Final answer:
The preferred therapy for prophylaxis of cluster headaches is verapamil, a calcium channel blocker. Other medications such as topiramate, lithium, and corticosteroids can also be used for prophylaxis.
Step-by-step explanation:
Preferred Therapy for Prophylaxis of Cluster Headaches
Cluster headaches are a type of primary headache disorder characterized by severe, unilateral pain around the eye or temple, accompanied by autonomic symptoms such as tearing, nasal congestion, and redness of the eye.
The preferred therapy for prophylaxis of cluster headaches is verapamil. Verapamil is a calcium channel blocker that helps to prevent the occurrence of cluster headache attacks.
In addition to verapamil, other medications that can be used for prophylaxis of cluster headaches include topiramate, lithium, and corticosteroids. These medications work by reducing the frequency and severity of cluster headache attacks.