Radix Scrophulariae and Psidium Guajava cannot be paired. It is pungent, sweet, hot and poisonous in nature, and belongs to the heart, kidney and spleen meridians. It has the efficacy of restoring yang to save the body (saving fainting, unconsciousness, etc. by warming and tonifying yang qi), tonifying fire to help yang (replenishing yang qi in the body), and dispersing cold and relieving pain (relieving pain by dispelling the cold evil in the body). This medicine can be used for heart yang deficiency, vomiting and diarrhea with deficiency cold, cold pain in the epigastrium (feeling cold pain in the stomach and abdomen), kidney yang deficiency (deficiency of yang qi in the kidneys), paralysis with cold and dampness, and death of yang. This drug should not be used by pregnant women, and should not be used in the same way as Semen xia, Psidium guajava, Pollen of the Smallpox, Phellodendron, Ampelopsis, Baihe and others. Psidium guajava is cold, bitter and sweet in nature, and can enter the three meridians of the lungs, stomach and large intestine. It has the efficacy of clearing heat and removing phlegm, relaxing the chest and dispersing knots (relaxing the knots in the chest), moistening the dryness and sliding the intestines. The drug is used to treat lung-heat cough, chest paralysis (chest tightness and pain) heart pain, breast, lung and intestinal carbuncle (carbuncle that occurs in the intestines and bowels, manifested by fever, pain in the right abdomen, and palpable lumps), constipation, and other conditions. It should be noted that in addition to not being able to be paired with epiphyllum, gua gua vulgaris should not be used with chuanwu, system chuanwu and caowu. In short, there is a conflict in the medicinal properties of these two herbs, so they should not be used together. If necessary, it is recommended to go to a regular hospital, under the guidance of a professional doctor.