Creating your own dispensatory is quite costly, so working with a dispensatory is an easy way to do this. There are quite a few and we have a resource page under important docs that can offer some good choices. When I was in full time practice I had a full dispensatory with over 200 tinctures, dried herbs, TCM extract granules, glycerites, capsules, etc (I still have a pretty large inventory of dried herbs, tinctures, capsules, etc, but much scaled down from what it once was). I created this over many years of practice, and had senior students making formulas for patients. It worked reasonably well and kept the costs down for my patients, but was very costly to manage, stock and run. As for TCM formulas in China they are rarely used as is, they are altered to fit the patient. In order to do this you need a full dispensatory. As an example su wu tang is a very commonly prescribed formula for “women’s issues”, but if you want to use it for uterine fibroids, you add cinnamon and tree peony. Using already made TCM formulas will often mean some herbs make sense for your patient , while others do not. I see practitioners who only use pre-made formulas often giving their patients 3-4 TCM formulas, they often overlap (for example a small safe dose of Licorice in one formula, but now they are getting it in 3 different formula and the possibility of adverse effects goes way up) or while most of the herbs make sense there are some that do not. This is why we teach individual materia medica and you will learn to construct your own formulas. You want to fit the formula to the patient, not fit the patient to pre-made formulas, it does not work well.