Is mucinex (guaifenesin) good for post nasal drip?

Mucinex (guaifenesin): Hello, if you have thick sticky mucus, the Mucinex (guaifenesin) will help to thin this mucus. If your mucus is thin and watery, it may make it worse.

Yes: This will help keep mucus thin. Better for post nasal drip(pnd) is a nasal steroid. Also sudafed if available in your part of the country otc. Should this continue then see your doctor to examine you. Could be simple allergies as well and you can use a combine antihistamine and decongestant if needed.