Are Polygonum multiflorum and its stem (Polygoni Multiflori Caulis) the same medicinal substance?

Generally speaking, Polygonum multiflorum (He Shou Wu) and its vine stem (Shou Wu Teng) are not the same medication, and blind use should be avoided. The specific analysis is as follows:

Polygonum multiflorum primarily refers to the dried tuberous root of the plant Polygonum multiflorum. Its main functions include nourishing the liver and kidneys, enriching essence and blood, darkening hair, and strengthening tendons and bones. It is commonly used to treat symptoms such as dizziness, tinnitus, soreness and weakness in the lower back and knees, hair loss, and premature graying. Shou Wu Teng, on the other hand, refers to the dried stem of the Polygonum multiflorum plant. It is primarily used to treat palpitations, insomnia, frequent dreaming, forgetfulness, rheumatic pain, and skin itching. Shou Wu Teng also has effects of nourishing yin, moistening dryness, enriching the blood, improving blood circulation, and reducing blood coagulation.

Polygonum multiflorum and Shou Wu Teng are used for different conditions and symptoms. Patients should choose the appropriate medication based on their doctor's advice and individual health conditions. When using these herbs, it is essential to strictly follow medical instructions and avoid self-medicating to prevent adverse outcomes.