Generally two weeks for any effect, and up to six weeks for maximal effect. Note that all individuals are highly variable in their response to drugs (especially drugs of this type) so results will...
Within about 30 minutes you may begin to feel restless leg syundrom throughout your body. i would reccomenend to go to sleep immediatley after you take the tablet.
Effects should be noticeable in 30 minutes, with full effect between 45 minutes and one hour. The drug will clear fairly rapidly as well, lasting only a few hours.