Dextromethorphan/guaifenesin is really an about-the-counter mixture medication made use of to deal with signs of successful cough and upper body congestion. Dextromethorphan and guaifenesin ended up invented separately.To overview: SAE and DD report SAE and DD re­port­ing for per­for­mance stud­ies SAE and DD re­port­ing for clin­i­cal in�