Pseudoephedrine
"Apparently I have taken this drug longer than I realized. I was prescribed the Drixoral version of this more than 30yrs ago in the military. It worked for me then and works today. I have suffered Hay Fever and many allergies my entire life. Please everyone remember this drug is like all others, simply put, it works for some and can actually be detrimental to the health of others! This drug is not really meant for your flu like colds, it can help with some of the symptoms but truly works best for straightforward sinus problems. I have tried the 1 a day pills and if they worked it would be 2 to 4 hours of relief and then a similar time of eyes watering, nose running until it released more into my system. Long live SudoGest(prescription only)!"