In general, this disclosure is directed to techniques for generating, by a computing device, at approximately a time that a user is eating, at least one computer-generated indication. Based at least in part on the at least one computer-generated indication and pre-defined activity data that are indicative of a human consuming an ingestible substance, the computing device determines whether the user is currently consuming an ingestible substance. Responsive to determining that the user is currently consuming the ingestible substance, the computing device outputs a reminder to consume at least one particular ingestible substance, such as a medication.