Hello so I have anxiety disorder and ocd and I’m on medicine for it but lately I’ve been waking up middle night with a panic attack and my heart will race like crazy and I have to take Xanax to calm it down . 
My doctor prescribed me 25 mg of hydroxyzine instead of the Xanax but I’m worried to take it . I’m wondering if I should take it before bed so I’m not waking up with panic attacks ? Should I take half ? Does anyone have any experience?