We are sorry, but Dr Goldberg cannot enter into individual correspondence. I tried to get some information about the drug. In the Oxford Medical Dictionary, it's said to be a sedative rather than a tranquilizer. However, When I looked it up in 2 pharmacological guides, it seemed to me that it's not more likely to cause drowsiness than Diazepam. However, none of the guides said it's addictive in any way.
Hydroxyzine is an antihistamine that suppressed activity in subcortical regions of the brain.
The the results of the reduced activity of these subcortical regions is often reduced anxiety and possibly sleepiness. One advantage of hydroxyzine over diazepam is that hydroxyzine is not habit forming. On the other hand, it is not as reliable antianxiety agent as diazepam. While diazepam has anticonvulsant activity, there are reports of hydroxyzine-induced seizures. Q Given that both migraine and depression are serotonin based, I am interested in any studies, especially those available on the Net, of patients that have both migraine and clinical depression.