There is no such thing as a major contraindication to cooking epiphyllum, but because epiphyllum is poisonous, care should be taken to cook epiphyllum by decocting it first and for a long time. It is pungent, sweet, hot and poisonous, and belongs to the heart, kidney and spleen meridians. Its main effects are to restore yang to save the body (to save fainting and unconsciousness by warming yang qi), to tonify fire and help yang (to replenish yang qi in the body), and to disperse cold and relieve pain (to relieve pain by dispelling cold evil in the body). It is mainly used for treating weak pulse and cold limbs due to deficiency of dead yang, stuffy pain in the heart and chest due to deficiency of heart yang, abdominal pain and vomiting and diarrhea due to deficiency of cold. As epiphyllum is toxic, it is advisable to decoct it first before putting down other medicines. By decocting it for a long time, the toxicity can be reduced to ensure the safety of the medicine. This product is pungent, hot and dry, so it is contraindicated for people with yin deficiency and hyperactivity (deficiency of yin fluid and hyperactivity of yang qi), pregnant women, and should not be used with Semen xia, Psidium guajava, pollen of smallpox, shellfish, Ampelopsis japonica, Bai He. Specific drug use should consult a medical professional.