Benadryl and Haldol arguably don’t belong in the same sentence at all, considering their ridiculously different effects and profile. You’re right that they’re used though. Is there any reason Haldol should be used like that at all, beyond it already being available as a psych drug? And even if Benadryl isn’t as effective (I dunno) surely something that isn’t as bad in side effects could be found? Many instances of said sedation are totally unnecessary, but many are eminently necessary to restrain someone actively violent.