regardless of whether you have inhalant allergies (dust allergy, seasonal allergy, hay fever, allergic rhinitis, etc), ask your doctor if any of the following are appropriate for you
ipratropium nasal spray 0.03%
nasal steroid (flonase, nasonex, nasocort, rhinocort)

if you do have inhalant allergies, ask your doctor if any of the following are appropriate for you
over-the-counter antihistamines
nasal antihistamine (astelin, astepro...that shiz be bitter)

you'll probably still be snotting, but less.