Guaifen-C and blood pressure

I was taking guaifen for a sinus infection. I felt like I was dieing. It seemed like I had no blood pressure what so ever, my stomach hurt constantly, could not sleep, headache, awful taste in my mouth and was constantly freezing. I finally figured out that it was the medication causing these awful symptoms. When I looked up guaifen on the internet I was appauled that a doctor would prescribe such a thing!

I believe this medication, Guaifen PSE ER, may have been a factor with problems in my left eye. Was on it for a week and began to see light flashes, and then floaters. Had to see my ophthalmologist immediately. It may have raised my blood pressure enough to cause this problem. Will not use it again!

I was prescribed Guaifen 600Mg tablets to help alleviate sinus and chest congestion. It seemed to help for the first day, but today at noon I literally thought I was going to die. I experienced severe dizziness to the point I had to hold my head up. I was ubable to stand or walk. My co-workers said all the color disappeared from my face and my hands, feet and arms felt as though I was standing an ice cold shower. My co-workers took my blood pressure and pulse and they were normal, It took at least 30 minutes before I could get up.