Hydroxyzine is a prescription strength antihistamine that has potent anti anxiety effects. I tried 50mg and that knocked me out. I then tried 25 and was drowsy, but definitely sedated. Anxiety was gone at that point, but the drowsiness was strong. Then I cut that in half and tried 12.5 and this was perfect for me. My anxiety was gone but I was not drowsy at all.
I have found that if my anxiety is really bad, I do need to take 25mg to get the effects without drowsyness, but this is when its severe. You need to play around with this drug to find the dose that works best for different anxiety levels.
Other antihistamines do not do nearly the job that Hydroxyzine does. I have read that other antihistmaines help anxiety, but I tried Chlorpheniramine and Diphenhydramine and they do not. Just feel lousy afterward and sleepy.
Just thought I would share my experience if anybody is looking to use an antihistamine for their anxiety. Hydroxyzine is also easy to get from any doctor. I got a prescription from Doctor on Demand. It was $6 to fill.
Another thing to share: The next day I actually feel pretty well rested and clear headed. Other antihistamines make me feel lousy the day after, this one does not.