These drugs block the action of luekotrienes, naturally occurring substances in the body that contribute to inflammation. These drugs are typically prescribed to treat occasional and mild symptoms. Taken before exercise or exposure to cold air, they can also help prevent attacks. An older beta-agonist and bronchodilator, theophylline, is taken as a pill to relieve nighttime symptoms. For those whose asthma is related to allergies, allergy desensitization by means of injection may be an effective treatment option.
Allergy desensitization consists of injecting tiny amounts of the irritant into the skin.
The result can be increased tolerance to the irritant.