A pharmaceutical compounding system having automated micro-dosing capability and using exchangeable source containers containing respective drugs, the system comprising an automated capsule-filling machine configured for compounding: an interface configured for receiving of prescription information for particular patients； and a dispensing head containing a solid-form drug； wherein said drug can be dispensed from said dispensing head by said machine such that the drug's active pharmaceutical ingredient (API) alone can be accurately dosed； and wherein the dispensing head is part of a set of multiple dispensing heads configured for compounding with said system.
