Cough medication precautions:
- A cough that produces mucus can aid healing by expelling infected material. Suppressing this type of cough may reduce your body's ability to fight off the infection.
- Cough medicines can cause sleepiness and interact with alcohol, sedatives, and some antidepressants.
- Cough medicines should be used with caution in those with asthma, heart disease, high blood pressure, and prostate enlargement.
- Cough suppressants can make you sleepy or dizzy. This is especially true with prescription cough medicines.
- Follow product package instructions.
- Those with chronic bronchitis, emphysema, or chronic obstructive pulmonary disease may need to cough frequently to clear mucus. Cough suppressants may make the illness worse.
Continue to Cough Expectorants
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- Irwin RS, Curley FJ. The treatment of cough. A comprehensive review. Chest. 1991 Jun;99(6):1477-84. 
- Schroeder K, Fahey T. Should we advise parents to administer over the counter cough medicines for acute cough? Systematic review of randomised controlled trials. Arch Dis Child. 2002 Mar;86(3):170-5. 
- Schroeder K, Fahey T. Systematic review of randomised controlled trials of over the counter cough medicines for acute cough in adults. BMJ. 2002 Feb 9;324(7333):329-31.