What is the ruling on the fast of one who ate and drank after the dawn (Fajr) adhan out of forgetfulness, due to taking diabetes medication?

Consuming medicine or food five minutes after the Fajr adhan invalidates the fast, whether the amount is small or large. However, if the eating, drinking, or taking medicine was done out of forgetfulness, the fast is valid, and there is no need for a make-up fast, though making up the day is more cautious. But if you ate, thinking that Fajr had not yet dawned, and then it became clear that it had, then you are required to make up the fast according to the majority of scholars.