... Scientists believe ergot alkaloids work by constricting blood vessels in the brain and blocking the transmission of brain signals.Dihydroergotamine (Atzumi, Migranal, Trudhesa) is an ergot alkaloid. This class is associated with side effects, and doctors avoid prescribing these drugs if other treatments are effective. ...
Migraine Treatments and How They Work
... Scientists believe ergot alkaloids work by constricting blood vessels in the brain and blocking the transmission of brain signals.Dihydroergotamine (Atzumi, Migranal, Trudhesa) is an ergot alkaloid. This class is associated with side effects, and doctors avoid prescribing these drugs if other treatments are effective. ...