Ratio-fentanyl Sold in Canada.Easy to cook up into a shot . Gel patches are a pain to shoot to mention deadly.Measured in mcg (micrograms) it can be deadly to dose for someone with little tolerance. Also., the euphoria isn't there after you abuse it for a while ., but the toxic effects are still there . OD's, drowsy, low breathing , etc . . Fun stuff . A great way to learn the names of your ambulance medics :-)careful.