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Related Experiment Videos

Herbal antitussives.

Irwin Ziment1

  • 1Department of Medicine, Olive View-UCLA Medical Center, 14445 Olive View Drive, Sylmar, CA 91342, USA.

Pulmonary Pharmacology & Therapeutics
|July 9, 2002
PubMed
Summary
This summary is machine-generated.

The efficacy of many herbal cough medicines remains unproven, with active compounds often unidentified. Despite this, these popular remedies are unlikely to demonstrate significant therapeutic activity beyond placebo effects.

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Area of Science:

  • Pharmacology and Ethnobotany
  • Herbal Medicine Efficacy
  • Phytochemical Analysis

Background:

  • The precise mechanisms of action for many cough medicines, particularly herbal remedies, are frequently unknown.
  • The effectiveness of medicinal plants and their specific phytochemicals in cough treatment is rarely rigorously evaluated.
  • Identifying the most active phytomedicinal constituents is challenging, discouraging research due to high costs and difficulties.

Purpose of the Study:

  • To critically evaluate the scientific evidence supporting the efficacy of herbal cough medicines.
  • To explore the probable mechanisms of action for commonly used herbal cough remedies.
  • To assess the likelihood of herbal cough medications demonstrating significant activity beyond placebo.

Main Methods:

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  • Review of existing literature on the pharmacology of cough medicines and herbal remedies.
  • Analysis of the proposed mechanisms of action for popular herbal cough ingredients.
  • Comparison of the expected activity of herbal cough constituents with established pharmaceutical agents.

    • Main Results:

    • Most popular herbal cough medicines likely function as demulcents or non-specific emetic-expectorants, with actions limited to the oropharynx.
    • The active compounds in many herbal cough remedies are difficult to isolate and quantify, hindering efficacy studies.
    • Evidence for the clinical effectiveness of even marketed herbal derivatives like guaifenesin is scarce.

    Conclusions:

    • It is probable that most herbal cough medications will not demonstrate efficacy superior to placebos in rigorous clinical trials.
    • Despite a lack of proven efficacy, herbal cough products are expected to remain popular among patients and healthcare providers.
    • Further research into the specific phytochemicals and mechanisms of action of herbal cough remedies is needed, though challenging.