Coix seed is slightly cold and sweet, which is a good product for both medicine and food. Its main functions are eliminating dampness and removing arthralgia, invigorating spleen and regulating stomach, promoting diuresis and clearing lung. Ophiopogon japonicus is sweet, slightly bitter and slightly cold. Heart, lung and stomach meridians. Function: nourishing yin and promoting fluid production, moistening lung and clearing heart. Can be used for treating lung dryness, dry cough, tuberculosis cough, body fluid injury, thirst, vexation and insomnia, thirst due to internal heat, constipation due to intestinal dryness, and diphtheria. Among the eighteen contraindications of compatibility of traditional Chinese medicine, Coix seed and Ophiopogon japonicus have no contraindications. You can use it together. But both are cold things, and those with cold constitution should use them with caution.