I have very bad seasonal allergies. I have tried everything, Zyrtec, Claritin (loratadine) and Allegra. Nothing works, what can I take?

See an allergist. If none of these OTC meds worked, unlikely that anything else will, you need to be evaluated, good history and physical examination. See your doctor first for initial evaluation, who would refer you or check aaaai.org or acaai.org for an allergist in your area, best wishes.