Tip - How Long Does It Take for an Allergy Medicine to Work? | LIVESTRONG.COM

Allergies are a reaction of the immune system to harmless substances. Allergies may cause nasal symptoms, hives, asthma or even anaphylaxis, a severe form of allergy that may be fatal. Most mild allergies can be controlled with simple, symptomatic treatments. The most important form of treatment, however, is for individuals to avoid the various...