Doctor prescribed hydroxyzine to help me deal with a compulsive behavior, but nothing i've read mentions anything of the sort. how does it help this?

Soften Symptoms: Hydroxyzine is often used to soften anxiety. Sometimes softening anxiety alleviates the triggers to compulsive reactivity. The medication is an antihistamine and has a long history as a treatment for treating anxiety. What is nice is that is has fewer risks and side effects than modern day anti-anxiety medications and less addictive potential than benzodiazipines.