The use of stimulants for recreation purposes has increased considerab
ly during the 20th century. Cocaine was first considered to be a drug
of potential abuse during the First World War but was only perceived a
s a serious threat when it became widely used in socially and economic
ally deprived urban areas of the USA in the 1980s. Use of amphetamines
was common among certain occupational groups as a means of remaining
alert until the 1950s, when they were seen to be abused by a small min
ority of recreational users. Controls were then introduced in most dev
eloped countries. The public health issue of stimulant use is that of
finding a balance between the prevention of serious social or personal
harm caused by abuse of these drugs while not impeding their benefici
al use.