allergic rhinitis
"My permanently blocked and stuffed up nose cleared within about 3 days of starting this medication, it was fantastic until about two days later when I began to suffer some serious side effects; hives, conjunctivitis in one eye and flu-like aches and pains.  I felt so awful I quit taking the medication that day.  Now I'm too scared to try it again!  If it hadn't have been for the side effects I would've given 10/10."