Six kinds of people should not use Platycodon grandiflorum is not true; Yin deficiency long coughing people avoid using, gas reversal and coughing up blood crowd prohibited, allergic people with caution. Platycodonopsis is the name of traditional Chinese medicine, its flavor is bitter, pungent, flat, there is the lung, the effectiveness of the pharynx and can be expectorant, but also the effect of pus; cough phlegm has a role in the chest full of coercive pain (coercive pain), mute, but also the treatment of carbuncle spitting pus. Excessive use of Platycodon grandiflorum will have nausea, vomiting and other adverse reactions; Yin deficiency and prolonged coughing patients are prohibited to take, the lower deficiency and the rising of anger is prohibited, allergic people should be cautious; need to pay attention to not be used in the same way with Bletilla, Longan, Gentian herb. If you need to use the drug, should be guided by a traditional Chinese medicine practitioner, do not buy and use on your own, so as not to delay the condition.