Can Cornus officinalis (Shanzhuyu) be added to Si Wu Tang (Four Substances Decoction)?

Generally speaking, Cornus officinalis can be added to the Si Wu Tang (Four-Ingredient Decoction), but it should be done under the guidance of a physician. The detailed explanation is as follows:

Si Wu Tang consists of four herbs: Angelica sinensis, Ligusticum chuanxiong, Rehmannia glutinosa (processed), and Paeonia lactiflora. It has multiple functions, including nourishing blood, regulating menstruation and relieving pain, and improving skin complexion. Cornus officinalis has effects such as nourishing the liver and kidneys, astringing and preventing prolapse, and strengthening the heart. Adding Cornus officinalis to Si Wu Tang can enhance the formula's nourishing effects on the liver and kidneys, making it suitable for patients with symptoms such as liver and kidney deficiency and irregular menstruation.

However, Si Wu Tang is not suitable for everyone. If a patient has a constitution with excessive internal heat, adding Cornus officinalis—which has warming and nourishing properties—may not be appropriate, as it might exacerbate internal damp-heat and lead to other discomforts. Therefore, it is recommended to use Si Wu Tang with Cornus officinalis under the guidance of a qualified physician to ensure the safety and effectiveness of the treatment.

When taking Si Wu Tang with Cornus officinalis, it is advisable to avoid consuming excessively cold, spicy, or greasy foods. Instead, one may eat more blood-nourishing foods such as red dates and longan to better support the blood-nourishing effects of the herbal formula.