These are things for boiling water and drinking. Sure, you can drink them. It's hard to say if you want to achieve your goal. Codonopsis pilosula and Astragalus membranaceus are warm in invigorating qi, while Ophiopogon japonicus and Coix lachryma-jobi are cold in promoting fluid production and eliminating dampness. Both heat and cold play a role in balancing cold and heat. Ophiopogon japonicus is suitable for nourishing yin, nourishing body fluid, moistening lung and clearing heart, and having less body fluid and vigorous fire. The conflict between coix seed dehumidification and diuresis and Ophiopogon japonicus seems unreasonable. According to the theory of traditional Chinese medicine, Ophiopogon japonicus and Coix seed are both acceptable, and my humble opinion is for reference only.