I have been on Haldol for 10 years on different doses. It does the job and hasn't caused any weight gain. Sometimes they have to increase or decrease the dosage over time. The highest amount I have ever been on was 10mg which was way too much. I used to get the injection for a while when they didn't trust me with my meds, and I have been as low as 2.5mg when I was working.

I am on 5mg right now, and I think it's a pretty good amount. Only thing is I feel a bit of stiffness in my arms and body, but exercise and stretching helps with that. I think its a good pill, it does the job.