From the early 1970s to today, the number of prescriptions written for amphetamines has fluctuated. In the 1970s and 1980s, there was a sharp increase in the use of amphetamines for weight loss and ADHD treatment. However, in the 1990s, concerns about the addictive properties of amphetamines led to stricter regulations and a decrease in the number of prescriptions being written. In recent years, there has been a slight increase in the use of amphetamines for ADHD treatment, but overall the number of prescriptions remains lower than in previous decades.