1. Inhalation therapy has been used for centuries to deliver medication to the lungs through smoke or vapors from plants. Ancient Egyptians and Indians commonly inhaled smoke from plants like belladonna and datura strammonium for respiratory relief.
2. In the early 1800s, asthma cigarettes containing datura became popular in Britain and America after an asthmatic doctor found relief from smoking them. Asthma cigarettes containing ingredients like atropine and cannabis gained widespread use through the 19th century.
3. Concerns over abuse and unpredictable dosing led to restrictions on asthma cigarettes in the 1980s. The development of modern inhalers like metered-dose inhalers and dry powder