As allergy medications can leave you feeling drowsy and are well known to adversely affect cognition, I recommend some other simple strategies to prevent and treat allergies this season. 
1.  Clean up your diet.  A diet low in common food allergens and inflammatory foods can help to lower your allergic response overall and thin mucous.  I recommend starting by avoiding dairy, wheat, corn, sugar and deep fried foods. 
2.  Wash off the allergens.  Using a saline nasal spray and washing your face twice daily can go a long way toward removing the offending particles.  A simple home recipe for a saline rinse is as follows:  1 quart of filtered water, 2 tsp. sea salt and 1/4 tsp. baking soda.  This can be put in a spray bottle, neti pot or used to rinse the eyes.  Keep the mixture in the refrigerator as it does not contain preservatives.
3.  Enhance Breakdown and Elimination of Histamine.  The nutrients Vitamin C, Magnesium, B-Complex vitamins and the bioflavonoid Quercetin all enhance the body’s ability to break down and eliminate histamine.  I also like freeze dried nettle leaf for the same reason.  

See me for more details about how to prevent seasonal allergies from slowing you down!