allergic rhinitis
"After using Singular for only 4 days, I was bragging about it to my friends who suffer from frequent allergy symptoms. It was prescribed both as an allergy relief and asthma prevention. In these spring months, I have only sneezed about 6 times and the itchy eyes and runny or stuffy nose are gone. It reappears if I forget a dose, so I attribute the relief to Singulair.  As far as it preventing asthma for me, I can't comment yet as I am also taking Advair to prevent asthma. The doctor has lowered my dosage of Advair and I hope to soon be able to discontinue the Advair and stay with Singulair. The listed side effects are many, but I think I've only noticed one so far (water retention in ankles)."