CAFFEINE SHOWN AS EFFECTIVE AT REDUCING EXERCISE-INDUCED ASTHMA SYMPTOMS AS AN ALBUTEROL INHALER An Indiana University study found that the ingestion of caffeine within an hour of exercise can reduce the symptoms of exercise induced asthma (EIA). A large dose -- 9 milligrams of caffeine per kilogram of body weight -- was as effective as the use of an albuterol inhaler, which is commonly used to treat or prevent exercise-induced asthma.