10/16/2008 05:12 am ET | Updated Nov 17, 2011

Allergies: Everything You Need To Know

Fall is second only to spring in sneezing, eye-itching misery. To help ease allergy sufferers' pain, we sort out the causes, tests, and ever more confusing treatments.

The Drug Market
Four doctors and a pharmacist assess the many meds now vying to soothe your sinuses.

Am I Really Allergic?
The author had an inkling that she might be mildly allergic to cats but wasn't sure. Before dosing up at the local Duane Reade, she went to four medical offices to get pricked, prodded, sensored, and shot.

The Enemies
Offending agents and how to combat them.

Filtered for Your Comfort
In goes the eye-reddening, sneeze-inducing nasties, out comes cool, clean air. Five filters, tested.