Allergy shots can reduce symptoms of asthma, use of inhaled medications and allergy-related asthma attacks, confirms an updated review of studies. Yet, the treatment can also cause systemic side effects that range from a stuffy nose to fatal anaphylactic shock.
About 30 percent of asthma patients experience improved breathing after receiving a series of injections that desensitize their immune systems to specific irritants, according to the review. The medical term for this treatment protocol is allergen immunotherapy.
