http://www.bongbastic.com/Iridium-2C-D-2,5-Dimethoxy-4-methyl-phenethylamine_4.aspx - 2C-D is a psychedelic substance, in small dosages also mentioned as smart drug, but more often used in higher amounts for its psychedelic properties. A common dosage is 20-50 mg, if insufflated it is 10-25 mg. For more information, visit us at http://www.bongbastic.com/