The latest national study by the Partnership for a Drug-Free America labels today's teens "Generation Rx" because of their increased recreational use of prescription drugs. The 17th annual study on teen drug abuse, released Thursday morning, found that about one in five teenagers has abused a prescription painkiller -- more than have experimented with either Ecstasy, cocaine, crack or LSD. One in 11 teens had abused over-the-counter products such as cough medicine, the study reported. According to the survey, the most popular prescription drug abused by teens was Vicodin, with 18 percent -- or about 4.3 million youths -- reporting they had used it to get high. OxyContin and drugs for attention-deficit disorder such as Ritalin/Adderall followed with one in 10 teens reporting they had tried them. Fewer than half the teens -- 48 percent -- said they saw "great risk" in experimenting with prescription medicines. "Ease of access" was cited as a major factor in trying the medications, with medicine cabinets at home or at friends' homes. This is the second year studies are being done on the abuse of legal drugs. But the first time surveyors included a question about the use of over-the-counter drugs to get high. Nine percent, or about 2.2 million teens, had experimented with cough syrup and other related products. The number of teens reporting marijuana use declined to 37 percent last year, compared with 42 percent a half-dozen years earlier. Over the same amount of time, ecstasy use declined from 12 percent to 9 percent, while methamphetamine trial dropped from 12 percent to 8 percent. The 2004 Partnership Attitude Tracking Study surveyed more than 7,300 teens, the largest ongoing analysis of teen drug-related attitudes toward drugs in the country. Its margin of error is plus or minus 1.5 percent. The nonprofit Partnership for a Drug-Free America, launched in 1987, is a coalition of communications professionals aimed at reducing the demand for illegal drugs.