There are two sets of
side effects - a transient phase, of a few weeks; and the chronic
side effects that accompany long term daily use.
* The transient phase starts with feeling like a space cadet: walking into things, slurring speech sometimes, memory lapses, arithmetic and spelling skills of a stoned monkey, weight gain while on usual diet, etc. This is during ramp up; for most people these effects start to fade after a few weeks to a month or so.