Mucinex—it contains guaifenesin, a mucus-thinning agent

that can help with postnasal drip, which can cause a cough, sore throat, and ear infections. Postnasal drip occurs when glands in the nasal passages produce too much or abnormally thick mucus. 

Mucinex Sinus-Max Pressure-Pain Oral is a combination medication that can help with symptoms caused by breathing illnesses like bronchitis and sinusitis. It contains an expectorant to thin mucus and decongestants to relieve sinus, ear, and stuffy nose congestion.