G.B.
Mucinex is for chest congestion. Why are you taking it for a sinus infection?
Musinex, Tussin, and Robotussin are ALL the same medication. Read the label. It's ALL Guaifenesin. AND it's ALL the same dose. It's an Expectorant for chest congestion. Also there is NO reason to pay for a name. It's the same medication. Save the money and go with the Walmart brand or store brand, it's all the same med.
You need to take a straight up decongestant. I only use real Sudafed and only take half a dose. It gets the goo moving and out. Then the antibiotic has a much better chance of killing the stuff that is left in the cavities of the sinuses.
Decongestant is to make goo runny and come out. Sudafed is the best. The fake sudafed is in almost everything and it doesn't work for any of us.
Antihistamine, Benadryl, Claritin, etc...DRY IT UP and make it sticky, stay where it is.
If you have a runny nose that is clear and no congestion then it's allergies and okay to take a med that will stop the allergic reaction.