In photography, a shutter is a device that allows light to pass for a determined period of time, exposing photographic film or a light-sensitive electronic sensor to light in order to capture a permanent image of a scene.
When used in combination with an antiemetic such as metoclopramide, DHE is as effective as opiates, valproate, and ketorolac in relieving migraine headache and preventing relapses, said Dr. Chaudhry. Its bioavailability is 100% when given intramuscularly or IV and about 40% when given as a nasal spray, she added.
Intravenous antiemetics, with or without intravenous dihydroergotamine, are effective therapies in an emergency department setting. Dexamethasone may be a useful adjunct to standard therapy in preventing short-term headache recurrence. Intranasal lidocaine may also have a role in relief of acute migraine.