Maximum Strength Mucinex Sinus-Max (Day) Pressure, Pain & Cough & Nightshift (Night) Sinus Caplets is an OTC medicine for relief of your Multi-symptom Sinus Relief. Maximum Strength Mucinex Sinus-Max Day Pressure, Pain & Cough Caplets help to relieve pain, sinus pressure & congestion, headaches, controls cough and thins & loosens mucus. Maximum Strength Mucinex Nightshift (Night) Sinus Caplets help to relieve pain, cough, reduce fever, sore throat, runny nose, sneezing & nasal congestion. Nighttime relief for a better morning! FSA & HSA ELIGIBLE.