Hi guys! I am having mucinex D for my sinus problem. I had this sinus infection a week ago and its terrible to say the least. Ok my doctor had prescribed me mucinex D for twice daily dosing. It has two ingredients- guaiphenesin and pseudoephedrine. It seems to have increased my miseries if anything. My sinus problem has aggravated and the cough which I was getting before has also thickened. Are these some of the early side-effects of mucinex-d? What all side-effects I can expect?
