allergic rhinitis
"I received this medication as a free sample via U.S. Mail.  It cleared my sinuses for 24 hours but I was also bolt awake for 24 hours, like I was on some kind of stimulant.  I would take it in severe sinusitis attacks, but not for routine allergy treatment.  It also dried my sinuses out so badly that I was afraid I'd get a nosebleed for days afterwards."