This report contains national estimates of Americans' perceptions of the availability of various illicit drugs and of the risk of harm associated with their drug use. These 1992 estimates are part of an ongoing national survey. The report analyzes three basic perceptions concerning drugs: (1) the relationship between perceptions and use; (2) availability; and (3) risk of harm. On the first perception, results show that drug use correlated with attitudes and beliefs about drugs. Among those who reported that marijuana was easy to get, the rate of current marijuana use was 6.6 percent, compared to a usage rate of only 1.4 percent among those who reported that marijuana was not easy to obtain. For the second perception, 59 percent reported that marijuana was easily procured, with 40 percent claiming that cocaine or crack was readily obtained. Changes in perceived availability from 1991 to 1992 were small and there were decreases in the percent reporting the ready availability of marijuana and cocaine or crack. For the perceived risk of harm, 45 percent believed that occasional marijuana use was associated with great risk of harm, while 68 percent claimed that trying cocaine once or twice could lead to great risk or harm. Perceptions were also recorded on other drugs and on tobacco use. Survey results are presented in 12 tables. (RJM)