I think it is important to mention that medications (OTC or prescription) are not the only option for allergies. There are many natural products that have wonderful anti-allergy actions. Butterbur, quercitin, ect. Also, diet always plays a role here and it cannot be ingnored.

Lakeshore Wellness Center: Naturopathic Holistic Medicine and Acupuncture in Chicago.
http://www.lakeshorewellnesscenter.com
http://www.rxacupuncture.com