This invention provides a system for compounding a pharmaceutical product for hormone replacement therapy. The system has a set of concentrated reagent compositions, each containing one or more steroid hormones dissolved in one or more solvents. The needs of each consumer are ascertained, and a pharmaceutical product is compounded for them using the concentrated reagent compositions. Each product has a custom tailored combination of steroid hormones at a concentration that is therapeutically effective for the consumer in accordance with their needs.
