About this trial
A randomized, double-blinded, placebo-controlled clinical trial using a Chinese Medicine formula in treating Chronic pharyngolaryngitis. Subjects will be randomized into a treatment group or placebo group for 8 weeks, and then followed by an 8-week post-treatment visit.
Eligibility criteria
Qualifiers
18 years of age or above (Chinese subjects only);
Persistent symptoms of pharyngitis (sore throat, globus, dry throat, dry cough, throat irritation) for more than 3 weeks;
Determined to be the following Chinese medicine syndromes by Registered Chinese Medicine Practitioners (RCMPs): Wind-heat invading the upper-jiao, or phlegm heat or Yin deficiency;
Visual analog scale (VAS) score for pain ≥ 50 mm;
Disqualifiers
Known severe medical conditions, such as cardiovascular, liver or renal dysfunction, diabetes mellitus, cancers, cerebrovascular diseases, blood system diseases;
Concomitant use of steroids, nonsteroidal anti-inflammatory drugs (NSAIDs), anticoagulants, and immunotherapy within the past week;
Impaired hematological profile and liver / renal function exceed the upper limit of the reference value by 2 times;
Known Allergic rhinitis;
Trial design
Treatments tested in this trial
- Qingyan Lihou Decoction
- Placebo