Let us get the major negative out of the way first – the chip is the size of a scrabble tile. While smaller devices might be acceptable, many people would not like something so large embedded into their skin.

http://www.mchips.com/technology/technology.html

As you can see, the microchip is small, but it needs a reservoir beneath it to hold all the medicine.

The advantages are awesome:

• Drug delivery for up to 16 years
• Turn on/off wirelessly (via an app)
• Never forget to take your medicine
• No repeat visits to the pharmacy / drugstore
• Available in 2017

Another disadvantage is that many of the target market would want multiple medications delivered in this manner – how many can you implant?