Hi Mary,
I'm sorry your daughter has been so ill. Do you mean DHE45, Dihyroergotamine? (I've never heard of GHE). This is in a group of medicines called ergot alkaloids and can be used to treat severe Migraines, like Status Migrainous.
We have information on Status Migrainous HERE and treatment options HERE.
I hope your daughter is feeling better. Have she seen a Migraine specialist yet? Look HERE for that information.
Nancy