Can Hei Shun Pian be taken with Wu Mei?
Generally speaking, it is acceptable to consume Heishunpian (black顺片) together with Wu Mei (Chinese plum). The detailed explanation is as follows:

Heishunpian is a warming herb that helps to warm yang and dispel cold, while Wu Mei is neutral in nature and has effects of astringency and promoting body fluid production. When used together, they are suitable for individuals with cold body constitution or cold-damp symptoms to consume in moderation. For example, if one frequently feels cold-intolerant, has cold limbs, or suffers from cold-damp bi syndrome (painful obstruction syndrome), consuming an appropriate amount of Heishunpian together with Wu Mei under a doctor's guidance may help warm yang, dispel cold, and alleviate discomfort.
However, due to Heishunpian's warm and hot nature, excessive consumption may easily cause heatiness or exacerbate internal heat sensations. Additionally, Wu Mei has a high acidity and may irritate the gastric mucosa, particularly for those with sensitive stomachs, potentially leading to adverse effects. In such cases, blind consumption might produce counterproductive results and even negatively affect health.
Furthermore, while using Wu Mei, it is recommended to maintain a bland diet and avoid consuming spicy, cold, or other irritating foods that may interfere with the herb's effectiveness. Heishunpian is contraindicated for pregnant and lactating women, as its components may have adverse effects on the fetus or infant.