
See the voice-activated ‘joymaker’ from The Age of The Pussyfoot , by Frederik Pohl, 1966: http://technovelgy.com/ct/content.asp?Bnum=1026
If you can imagine a combination of telephone, credit card, alarm clock, pocket bar, reference library, and full-time secretary, you will have sketched some of the functions provided by your joymaker.
You were right the first time. It dispenses meds, stimulants, intoxicants and so on from reservoirs within it.