Abstract: An example device includes an electrochemical cell configured to generate a first electrical signal indicative of an amount of glucose in a fluid of a person, the electrochemical cell comprising a working electrode, a counter electrode, and a reference electrode; and a background electrode configured to not catalyze a reaction with glucose and is configured to generate a second electrical signal indicative of an amount of electrochemical interference proximate the electrochemical cell.

Abstract: Methods, systems, and devices for continuous glucose monitoring. More particularly, the methods, systems, and devices describe a working electrode with a GOx sensor and a background electrode in which the background electrode has no GOx sensor. The system may then compare the first signal and the second signal to detect ingestion of a medication by the user. The system may generate a sensor glucose value based on the comparison.