Ergotamine is a medication primarily used to treat migraines and cluster headaches. It works by constricting blood vessels in the brain, which helps alleviate headache symptoms. This drug is derived from a fungus called Claviceps purpurea, which grows on certain grains. While effective for many, ergotamine can have side effects, including nausea, dizziness, and potential cardiovascular issues. It is important for patients to use it under medical supervision, especially if they have pre-existing health conditions. Proper dosage and timing are crucial for maximizing its benefits while minimizing risks.