problem such as emphysema or chronic bronchitis Persistent or chronic cough such as occurs with smoking, asthma or emphysemaAsk a doctor or pharmacist before use if you are taking: The blood thinning drug warfarin Sedatives or tranquilizersWhen using this product Do not use more than directed (see overdose warning) Avoid alcoholic drinks Marked drowsiness may occur Alcohol, sedatives and tranquil