To the Editor: The growing popularity of cocaine as a recreational drug and the economics of its high price have led to the widespread use of substitute drugs.1 These compounds appear as adulterants in cocaine samples sold on the street,2 and they are also promoted as legal alternatives to cocaine itself. Advertisements in paraphernalia stores and magazines claim that these products are "like the real thing" and "will bring a smile to your face and blow your troubles away." Recent escalation of sales through health-food and grocery stores have been coupled with an increasing incidence of adverse reactions. I have . . .