Yes, you read right 
Has anyone used it? Vet has recommended it for overgrooming and the shouting
Happy to try alternatives but have done feliway, ovarid, clomicalm, and nearly every calmer the vet could find
I adore the lad to bits but he has been shouting for 90 mins tonight. He wants to go out, I won't let him because it's dark. If I let him out, he comes back in within 5 minutes screaming blue murder at me 

If I remove him out the room he just shouts at himself in the mirror