Posted by BrittPark on November 15, 2002, at 19:58:09
In reply to Risperdal - How long does it last?, posted by Dinah on November 15, 2002, at 10:56:39
According to RxList riperdal has a half life of about 3 hours in fast metabolizers and 20 hours in slow metabolizers (gene polymorphism). It's active metabolite has a half life of about 20 hours. At steady state most people don't notice they are taking it. I didn't. You must be a fast metabolizer.