According to http://www.utoronto....mphet D2Hi*.pdf
5'-Guanylyl imidodiphosphate increased D2 receptor density after amphetamine sensitization in rats. Also, high-intensity treadmill exercise, http://www.movementd...2/md_article.pdf and
http://www.reuniting.info/node/7200
It seems it may take 14 days replete depleted receptor sites at least in the case of fatty foods and sex, http://www.reuniting.info/node/3652.