A drug production device which receives information from a processor relating to a drug combination, comprising: a plurality of drug cartridges (310a, 310b, 310c), each configured to hold a quantity of a drug; a plurality of drug dispensers (312a, 312b, 312c), each of said drug dispensers coupled to a respective drug cartridge (310a, 310b, 310c); a valve positioned in each dispenser configured to allow drug from a respective cartridge to be dispersed when the valve is opened; a conveyor configured to convey a drug carrier in the form of an gelatin capsule through the device beneath the dispenser for the first drug, where a predicted or desired dosage of the first drug is dispensed into the carrier and then to as many dispensers as necessary depending on the predicted or desired and/or prescribed drug selection, combination and dosage, with the appropriate dosage of each drug being dispensed into the carrier from each dispenser; characterized in that the plurality of drug cartridges (310a, 310b, 310c) are each configured to hold a quantity of a drug in the form of substantially equally sized microtablets containing a known dosage of the drug; and wherein said drug production device also includes a controller, wherein said drug production device also includes a meter for measuring an amount of drug passing through each dispenser, wherein the meter comprises an optical particle counter by means of which, it counts the number of substantially equally sized units of a known quantity of a drug as the substantially equally sized units of microtablets pass through the valve and into the gelatin capsule; a capsule sealer for sealing the open capsules; and a verification stage, for verifying that the gelatin capsules contain a correct dosage and combination of drugs, wherein a combination drug product in the gelatin capsule is produced from the dispensed drugs. a plurality of drug cartridges (310a, 310b, 310c), each configured to hold a quantity of a drug; a plurality of drug dispensers (312a, 312b, 312c), each of said drug dispensers coupled to a respective drug cartridge (310a, 310b, 310c); a valve positioned in each dispenser configured to allow drug from a respective cartridge to be dispersed when the valve is opened; a conveyor configured to convey a drug carrier in the form of an gelatin capsule through the device beneath the dispenser for the first drug, where a predicted or desired dosage of the first drug is dispensed into the carrier and then to as many dispensers as necessary depending on the predicted or desired and/or prescribed drug selection, combination and dosage, with the appropriate dosage of each drug being dispensed into the carrier from each dispenser; characterized in that the plurality of drug cartridges (310a, 310b, 310c) are each configured to hold a quantity of a drug in the form of substantially equally sized microtablets containing a known dosage of the drug; and wherein said drug production device also includes a controller, wherein said drug production device also includes a meter for measuring an amount of drug passing through each dispenser, wherein the meter comprises an optical particle counter by means of which, it counts the number of substantially equally sized units of a known quantity of a drug as the substantially equally sized units of microtablets pass through the valve and into the gelatin capsule; a capsule sealer for sealing the open capsules; and a verification stage, for verifying that the gelatin capsules contain a correct dosage and combination of drugs, wherein a combination drug product in the gelatin capsule is produced from the dispensed drugs.