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Buckley's® Dry Cough Extra Strength Cough Suppressant Syrup, 150 mL, is formulated to provide up to 8 hours of relief from dry, hacking coughs and irritated throats. This non-drowsy formula contains 30 mg of dextromethorphan hydrobromide per 10 mL dose, an effective cough suppressant that acts on the cough center of the brain to reduce the urge to cough. Additionally, it soothes the throat on contact, providing comfort from irritation.