According to the principle of compatibility of traditional Chinese medicines, Dendrobium candidum should not be used together with mirabilite, croton, fried silkworm and other traditional Chinese medicines. Pharmacological experiments have proved that large doses can inhibit the heart, lower blood pressure and inhibit breathing. The effective components of Dendrobium candidum are mainly Dendrobium polysaccharide, Dendrobium alkaloids and total amino acids, etc., which are sweet and slightly cold in nature and enter the stomach and kidney meridians. It has the effects of benefiting stomach, promoting fluid production, nourishing yin and clearing heat, and has important effects on yin injury and fluid deficiency, dry mouth and polydipsia, eating less and retching, asthenic heat after illness, blurred vision and so on. Pharmacology has proved that there are no adverse consequences when pregnant women take iron maple bucket, but special groups like children and pregnant women should take it under the guidance of doctors. Don't choose those five-hair-one-gram maple buckets in the medicinal materials market, almost all of them are made of Dendrobium nobile.