I have read good things about good old haloperidol and as you say, it is weight neutral - a big deal. I took cogentin with geodon because my doctor erroneously believed that I would otherwise develop pseudo-parkinsonism. My next doctor dismissed this idea, took me off cogentin and I did just fine. But I had taken Cogentin this way, unneeded, for 18 months, without a single side effect. I feel stupid having taken so much of unneeded medication, but here you go - one example when Cogentin did not hurt in any way.