U.S. regulators have approved the first digital pill with an embedded sensor to track if patients are taking their medication properly, marking a significant step forward in the convergence of health care and technology.

The medicine is a version of Otsuka Pharmaceutical Co.'s established drug Abilify for schizophrenia, bipolar disorder and depression, containing a tracking device developed by Proteus Digital Health.

The system offers doctors an objective way to measure if patients are swallowing their pills on schedule, opening up a new avenue for monitoring medicine compliance that could be applied in other therapeutic areas.