Drugs can also be smoked or "chased". Smoking and chasing have negligible risk of bacterial or viral transmission and the risk of overdose is lessened compared to injecting, but they still retain much of the "rush" of injecting as the effects of the drug occur very rapidly. Chasing is a far safer way to use heroin than injecting, with one common option being to use new aluminum foil, first passing a cigarette lighter flame over both sides/or just the shiny side at least, which is to help sterilize it ("curing").