Aims. To monitor young people's experience and knowledge of illicit drugs b
etween 1969 and 1999 at intervals of 5 years. Design. The same confidential
anonymously completed questionnaire was used throughout. Setting. Three se
condary schools in Wolverhampton, an English Midlands town. Participants. T
wo hundred and seventy-four pupils aged 14-15 completed the questionnaire i
n 1999. Previous sample sizes were 471 in 1969, 523 in 1974, 648 in 1979, 5
40 in 1984, 380 in 1989 and 392 in 1994. Measurements. Self-reported levels
of experience and knowledge of illicit drugs. Findings. Over 30 years the
proportion of pupils who knew someone taking drugs more than quadrupled fro
m 15% (71/461) in 1969 to 65% (254/392) in 1994 and decreased to 58% (157/2
73) in 1999. The proportion who had been offered drugs increased nine-fold
from 5% (24/462) to 45% (175/392) and levelled to 48% (131/274) in 1999. Th
e proportion mentioning "ecstasy", LSD and amphetamines increased while amy
l nitrite decreased significantly. "To feel big, grown up" was the main per
ceived reason for taking drugs. "To escape problems" increased significantl
y in 1999. Television remained the main source of information closely follo
wed by friends and talk in school. Conclusions. The experience of illicit d
rugs, after increasing dramatically to a peak in 1994, has levelled out in
1999. Although the knowledge of the names of drugs has steadily increased,
knowledge of the effects has remained limited. Social and group pressures r
emain the main perceived reason for taking drugs and many may see drugs as
a way of coping with stress. Progress in education about drugs must take ac
count of wider issues in society.