Can taking Allegra daily in the morning and Singulair daily at bedtime dry me out too much? My nasopharynx feels dry and swollen -- or plastered with a sticky mucus? it s very hard to perceive exactly what s going on, and to describe the sensation, but it s very uncomfortable, and seems to make swallowing tricky. I spray with saline solution several times a day. Brushing teeth helps for a while. (I started taking allergy shots in March, so have to use Allegra and Singulair in the meantime.)