-- Posted by sadnessness at 5:56 am on Dec. 30, 2008 I was wondering how long certain side effects (especially the lack of appetite) persist for? The booklet inside the pack doesnt say much about time scales. Any help? 20mg a day -- Posted by MiNNiCK at 5:57 am on Dec. 30, 2008 My sister was on it and was always catatonic like. -- Posted by bellreavue at 6:01 am on Dec. 30, 2008 no idea sorry -- Posted by roflfuckyou at 6:02 am on Dec. 30, 2008 Depends on the person. It varies for everyone. -- Posted by thathappychild at 1:14 pm on Dec. 30, 2008 i didn't find any side effects, but if you are having them they usually only lasta few weeks after starting or changing to a new dose. if you're having bad side effects you should talk to whoever prescribed them because they could put you on a lower dose so you still get the good effects without so many side effects.