Cultural reference, not medical advice. For personal health questions, consult a qualified practitioner.
Category: How formulas are used
TCM texts traditionally describe a concept sometimes translated as "trapping the pathogen": the idea that a tonifying, nourishing formula given while an external illness is still on the surface can hold the pathogen inside rather than letting it resolve. In modern household practice this is why people pause tonics like Buzhong Yiqi Wan or Liuwei Dihuang Wan once a cold starts, and resume only after the acute phase has passed. This is a traditional observation, not a modern pharmacological claim — the active constituents of common cold viruses are not directly affected by these herbs. The practical advice from TCM practitioners is consistent: during fever, sore throat, or active digestive upset, pause the tonic, focus on the acute condition, and resume after recovery. As always with a chronic supplement, the person prescribing it (your physician or pharmacist) is the right person to ask.