Aetna Intelihealth
Aetna: Inteli Health: Allergy Medications: Questions for Your Pharmacist
Nice article that gives you some questions to ask your pharmacist to help you find the correct allergy medication. It also gives a little background information on some of the drugs available.
Other
American Academy of Allergy, Asthma and Immunology
This resource describes an organization that is involved in studies and treatments of allergies. Research and education are also important parts of this organization.