HI, I have been on Ability for 2 years, started at a higher does 10mg and have been decreased to a smaller dose 2 mg.. It really has worked well for me.. I haven't had any side effects at all. I used to have paranoia and I haven't felt that way in years.. I was told it can remain in your system for 96 hrs from just 1 dose, so it's a long acting drug..