Efficacy and safety of Zihua Wenfei granules in treatment of postinfectious cough (wind-cold invading lungs syndrome): study protocol for a randomized controlled trial

Table 2 Diagnostic criteria for wind-cold invading lungs syndrome

Category	Symptoms or signs
Main symptom	Cough
Minor symptoms	① Throat itchiness, ② cough aggravated by wind-cold, ③ a small amount of white phlegm, ④ chest tightness
Tongue	Pale red tongue with thin and white coating
Pulse condition	Floating, tight, or normal pulse

Patients with main symptom+①+②+either of the other two minor symptoms+appropriate tongue and pulse condition can be diagnosed as wind-cold invading lungs syndrome

ISSN: 1745-6215