WHITEHOUSE STATION, N.J. (AP) — Merck & Co. says the Food and Drug Administration has approved its new tablet for grass allergies, Grastek, for patients five to 65 years old.

Meant as an alternative to weekly allergy shots, the tablet dissolves under the tongue. Taken daily for a few years, it gradually reduces sensitivity to common grasses, instead of temporarily relieving symptoms including sneezing, runny nose, and itchy, watery eyes.