My doctor prescribe Guaifenex 600/120 for me yesterday. I had si...

My doctor prescribe Guaifenex 600/120 for me yesterday. I had sinus pressure, ears and throat itchy and sore, head congestion. I took one pill at 6 pm, about 20 minutes later I could feel my throat and ears feeling better, and the congestion breaking up and draining. However, the stomach pains and cramps, heart racing, and my blood pressure rose to 153/92. I was so restless I only slept from 9 pm to 10:15pm. No matter what I did, the stomach pain wouldn't go away. Drinking extra water, changing positions didn't seem to help. I'm not tried but I feel so jittery, and restless. The medicine works immediately, but there are some serious side effects to consider.