One of the latest products being used as "legal drugs" are actually labeled as "plant food" and "bath salts". Unfortunately at $20-$40 a gram it would seem that niether of these uses are the actual outlet. Why are tobacco shops selling gardening and bathing products? Because they can, and make a tidy profit at the same time. Bath Salts (Ivory Wave, Sextacy, Purple Wave, Vanilla Sky, Gloom, Charge+, Pure Ivory, Purple Rain, Ocean Burst, Whack, Hurricane Charlie, Crush, Bolivian Bath, Fly, White Rush, and others) and Plant Food (Molly's Plant Food, Purple Monkey Plant Food, etc.) are actually being used to accomplish a high similar to ecstacy, cocaine, and methanphetamine.
These synthetic drugs skirt existing laws by being just different enough from banned drugs, and marketing the materials as "not for human consumption". “Bath salts” are powerful stimulant drugs that are commonly available on the Internet, in local tobacco shops, truck stops, convience stores, etc. Because the ingedients and the materials themselves are not regulated they are deemed "safe". The mounting evidence would suggest that this is as far from the truth as possible.