For adults and children over age 12, Mucinex ER products are given at 600 to 1,200 mg every 12 hours. Combination cough and cold products : These contain guaifenesin plus other active ingredients ...

Why would Mucinex help with pregnancy ... anecdotal evidence of improvement in one patient’s sperm count and motility after taking guaifenesin 600 mg extended release tablets twice a day for two ...