Allergic Rhinitis — Controlled Trial of Chinese Herbal Medicine to Treat Allergic Rhinitis
Citation(s)
Chan RY, Chien WT The effects of two Chinese herbal medicinal formulae vs. placebo controls for treatment of allergic rhinitis: a randomised controlled trial. Trials. 2014 Jul 2;15:261. doi: 10.1186/1745-6215-15-261.
Chan, R Y.P., & Chien, W.T. (2013). Concepts of body constitution, health and sub-health from traditional Chinese medicine perspective. World Journal of Translational Medicine, 2(3), 56-66. (doi:10.5528/wjtm.v2.i3.56).
Yang SH, Yu CL, Chen YL, Chiao SL, Chen ML Traditional Chinese medicine, Xin-yi-san, reduces nasal symptoms of patients with perennial allergic rhinitis by its diverse immunomodulatory effects. Int Immunopharmacol. 2010 Aug;10(8):951-8. doi: 10.1016/j.intimp.2010.05.008. Epub 2010 May 28.
Effects of Chinese Herbal Medicine for Treatment of Allergic Rhinitis: A Randomized Controlled Trial
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
