Harvard report states many cough medications ineffective

Americans spend $3.5 billion annually on over-the-counter cough remedies. Experts say much of this money is wasted. Guidelines released by the American College of Chest Physicians (ACCP) earlier this year indicate that many of the "active" ingredients in cough remedies may be ineffective, reports the May issue of the Harvard Health Letter.

There are many non-prescription cough medicines, but most contain the same types of active ingredients in a limited number of strengths and combinations. Here are the four main ones:

  * Expectorants work by thinning mucus. Studies of their effectiveness
    vary, and the ACCP "cough committee" didn't endorse them.
  * Suppressants work by dampening the cough reflex. They provide short-term
    relief for chronic bronchitis symptoms, but aren't as effective on
    coughs caused by colds.
  * Decongestants work by constricting blood vessels, which shrinks swollen
    membranes and allows more air to pass through nasal passages.
    Decongestants can be effective in the short run, but they can cause
    side effects, and you can become dependent on decongestants in the form
    of nose drops.
  * Antihistamines help regardless of whether a cold or allergies is
    responsible for the cough.

So what should you take? The new guidelines advise leaving the cough and cold medicine section and buying an allergy medicine instead. Choose one that combines an older antihistamine (like brompheniramine, diphenhydramine or chlorpheniramine) with a decongestant.

On the other hand, if you think a cold or cough medicine works, it probably won't hurt you to stick with it, even if what you're paying for is a placebo effect rather than a proven remedy, states the Harvard Health Letter.