Cuscuta decoction is usually used 6 grams to 12 grams, and appropriate amount for external use, which needs to be determined according to the severity of the disease. Cuscuta, pungent, sweet and neutral in nature, is attributed to the liver, kidney and spleen meridians, with the effects of tonifying the kidney and benefiting the liver, consolidating semen and urine (consolidating semen and urine and preventing random leakage), settling the fetus and stopping diarrhea, and eliminating wind and removing blemishes when used externally. Cuscuta can be used to treat conditions such as lumbar and knee soreness (a feeling of soreness and weakness in the waist and knees), impotence due to deficiency of the liver and kidneys (weakness of the liver and kidneys), spermatorrhea, seminal emission, enuresis, frequent nocturnal urination, restlessness of the fetus, multiple miscarriages, dizziness, tinnitus, loss of vision, chronic diarrhea, as well as vitiligo. Generally speaking, for treating milder conditions, the dosage can be less than 9 grams, while for treating more serious conditions, it can usually be used up to 12 grams. In addition, if Cuscuta is the main ingredient in the formula, the dosage can be larger, up to 12 grams. If Cuscuta is used as an adjunct, about 6 grams can be used. Of course, Cuscuta chinensis is a traditional Chinese medicine and should be used under the guidance of a traditional Chinese medicine practitioner, so as to avoid the use of incorrect medicines, which may damage the body and cause delay in the condition.