A traditional Chinese patent medicine-Suhuang zhike capsule for cough variant asthma in adults: A protocol of systematic review and meta-analysis of randomized controlled trials.

AbstractBackground:Many people with cough variant asthma use Traditional Chinese Patent Medicine-Suhuang anti-tussive capsule to help reduce symptoms. However there is no systematic reviews had promising its efficacy and safety for cough variant asthma.Methods:Four English databases (PubMed, Web of