Robitussin knows it’s never just a cough — when you’re coughing, you’re sick. Robitussin Peak Cold Cough + Chest Congestion DM works to control and relieve frequent coughing and thin mucus to relieve chest congestion. For persistent symptoms, reach for non-drowsy Robitussin Cough + Congestion with a tough cough suppressant and an effective expectorant. Formulated for adults and children ages 12 and over, Robitussin Peak Cold Cough + Congestion should be taken in 10 ml doses every four hours. Do not take more than six doses in any 24-hour period. Robitussin cough and congestion liquid medicine also comes in sugar-free and max-strength formulas.