Digital pill lets the doctor know if you take your meds.

Approved by the FDA, an indigestible chip sends a signal via cell phone to doctors to let them know when and if medication was taken.The device, made by Proteus Digital Health, is a silicon chip about the size of a sand particle. With no battery and no sensor, it is powered by the body itself. 

The chip contains small amounts of copper and magnesium. After being ingested the chip will interact with digestive juices to produce a voltage that can be read from the surface of the skin through a detector patch, which then sends a signal via mobile phone to inform the doctor that the pill has been taken. 

Sensors on the chip also detect heart rate and can estimate the patient’s amount of physical activity. More than just a way for doctors to look over their patients’ shoulders, it will allow doctors to better assess if a person is responding to a given dose, or if that dose needs to be adjusted.

Source: forbes.comAdded: 31 May 2013