Prepared Aconite Tuber (commonly known as Fu Zi in Traditional Chinese Medicine, or TCM) has a long history of use in East Asian medicine, particularly for conditions involving pain and deficiency of yang energy. Its inclusion in formulas for "afterbirth pain" (postpartum uterine cramping or discomfort) is rooted primarily in traditional practice. In TCM theory, afterbirth pain may be attributed to cold, deficiency, or stagnation in the uterus following childbirth, and Fu Zi is believed to warm the yang, dispel cold, and alleviate pain by unblocking the meridians.

There is some historical documentation—such as its listing in classic Chinese medical texts (e.g., Shang Han Lun)—supporting the use of Prepared Aconite Tuber for pain syndromes, including those associated with the postpartum period. However, the evidence is largely anecdotal and based on traditional theory rather than modern scientific studies.

Modern pharmacological research on Fu Zi has focused more on its analgesic, anti-inflammatory, and cardiotonic effects, but rigorous clinical trials specifically examining its efficacy for afterbirth pain are lacking. Additionally, because aconite is toxic in its raw form, only properly processed (prepared) forms are used in medicine, and safety remains a significant concern.

In summary, the use of Prepared Aconite Tuber for afterbirth pain is justified by tradition and historical precedent, with limited direct scientific validation.