Are it safe to take Bajitian (Alpinia oxyphylla Miq.), Nuzhenzi (Ligustrum lucidum Ait.), and Shanzhuyu (Cornus officinalis Sieb. et Zucc.) together?
Generally speaking, it is acceptable to take Yi Zhi Ren (Alpinia oxyphylla seeds), Nu Zhen Zi (Ligustrum lucidum fruits), and Shan Zhu Yu (Cornus officinalis fruits) together, but they should be used in combination under the guidance of a professional TCM practitioner. The detailed explanation is as follows:

Yi Zhi Ren, Nu Zhen Zi, and Shan Zhu Yu are all commonly used herbs in traditional Chinese medicine (TCM), each having effects of nourishing the kidneys and enhancing cognitive function, nourishing liver Yin, and warming and nourishing the liver and kidneys, respectively. For symptoms caused by kidney deficiency, such as memory loss and dizziness and tinnitus, if the individual's constitution is suitable and there are no other contraindications, these three herbs may be appropriately combined under the guidance of a TCM practitioner to achieve a synergistic and enhanced therapeutic effect.
However, they are not suitable for all constitutions and conditions. Yi Zhi Ren has a pungent and warm nature and may easily cause excessive internal heat; therefore, it is not recommended for patients with heat-related vomiting, Qi stagnation with hiccups, or Yin deficiency with internal heat. Nu Zhen Zi has a slightly cold nature and should not be taken by patients with deficiency-cold syndromes of the spleen and stomach or kidney Yang deficiency. Shan Zhu Yu might affect blood pressure, so patients with hypertension or hypotension should use it cautiously and monitor blood pressure changes. When taking these three herbs, one should also avoid adverse interactions with other medications and should seek advice from a professional physician or pharmacist.
During the period of consumption, it is advisable to avoid eating pungent and irritating foods such as scallions, ginger, and garlic, as well as raw, cold, cooling, or excessively greasy foods, to prevent interference with the herbal effects or worsening of symptoms.