Ironbark flower, also known as Dendrobium ironbark, is a valuable tonic, and the contraindications in clinical application include the following points. The first point is that it cannot be applied together with some drugs, such as gypsum, croton, stiffness and lei pills. The second point, it is best to separate the decoction to ensure its medicinal effect, decoction time on the long side has the benefit. The third point, ironbark flower infusion tea should not be taken with radish and mung beans, radish has a laxative effect, affecting the absorption of ironbark flower, while mung beans and ironbark flower has the opposite effect, inhibiting its play. The fourth point is that some patients are not recommended to drink ironbark flower tea, such as patients with inflammatory infections or patients who are too weak to show hyperactivity.