Amphetamines were initially used to treat which medical condition?

Amphetamines were initially developed and used to treat asthma. They function as bronchodilators, which help to open up the airways in the lungs, making it easier for individuals with asthma to breathe. The stimulant properties of amphetamines also increased their appeal in the medical community for other conditions over time, but their original application focused on respiratory issues.

While amphetamines have been associated with various conditions such as obesity, depression, and anxiety disorders in later years, their initial use reflects their pharmacological action on the respiratory system. Thus, the correct answer highlights the historical therapeutic role that amphetamines played in addressing asthma-related symptoms.