Robitussin For Dry Coughs Relieves and controls dry- persistent coughs Does not make you drowsy Sugar free-will not cause dental decay Drug Interactions Diabetics: The sweeteners used in this product are unlikely to affect your diabetes. Please read product leaflet carefully. Warnings Do not exceed the stated dose. Keep out of reach of children. Do not use if the bottle cap is broken or damaged. Do not use after the expiry date shown.