In reality, whenever you snort a drug, you should do so very gently. Even so, some will inevitably end up being swallowed (the 'drip'), no matter how careful you are. So yes, a small amount will be absorbed through your stomach too, for the reason Josh stated and because it's impossible to insufflate with 100% efficacy. read more
Drugs can be smoked, snorted, inhaled, injected, swallowed as pills, absorbed through mucus membranes or applied through transdermal means (applied to the skin). Some substances can be eaten or drank, such as marijuana and alcohol. read more