Is it safe to take Liu Wei Di Huang Wan for three months without harming the body?

Generally speaking, for individuals with a normal constitution who are suitable for its intended use, taking Liu Wei Di Huang Wan (Six-Flavor Rehmannia Pill) for 3 months is usually harmless. However, if the user does not have a kidney yin deficiency constitution or has other underlying health conditions, taking Liu Wei Di Huang Wan for 3 months may potentially cause harm to the body. A detailed explanation is as follows:

Liu Wei Di Huang Wan consists of six herbs: prepared rehmannia root, cornus fruit, chinese yam rhizome, oriental water plantain rhizome, tree peony root bark, and tuckahoe sclerotium. It functions to nourish yin and support kidney health. If the user has a normal constitution and presents with symptoms of kidney yin deficiency—such as soreness and weakness in the lower back and knees, dizziness, tinnitus, tidal fever, and night sweats—taking this formula continuously for 3 months under the guidance of a physician generally does not cause harm to the body. This is because the formula has a relatively mild nature and its ingredients are comparatively safe. Long-term use can gradually improve the condition of kidney yin deficiency, regulate bodily functions, and enhance physical health.

However, if the user does not have a kidney yin deficiency constitution or has other existing health problems, long-term use of Liu Wei Di Huang Wan may potentially cause harm. For example, individuals with a yang deficiency constitution who take this formula may experience worsening symptoms of yang deficiency, such as cold intolerance, cold hands and feet, and loose stools. Liu Wei Di Huang Wan primarily nourishes yin, and individuals with yang deficiency already have insufficient yang energy. Taking yin-nourishing herbs further may exacerbate the imbalance between yin and yang. Additionally, individuals with weak spleen and stomach function may experience impaired digestive function from long-term use, leading to symptoms such as poor appetite, abdominal distension, and indigestion. This is similar to feeding heavy, greasy food to someone with a weak digestive system—it increases the burden on the gastrointestinal tract.

To ensure the safety and effectiveness of Liu Wei Di Huang Wan, it is recommended that individuals consult a qualified physician before taking it continuously for 3 months. Additionally, during the course of treatment, dietary adjustments should be made, avoiding spicy, greasy, raw, and cold foods, as these may interfere with the effectiveness of the medication.