Well I have some tablets that have the days printed on the bubble packs, so I can check if I have taken them or not. I have only once forgotton my morning set, including my metformin. But I have often forgotton my eveing set without realising and the next day see yesterdays still there, I findon average I forget once a week to take the eveing stuff.
My morning routine is fixed so taking my medication is part of it, but evenings vary so much that I can easily get distracted.
It is particualrly hard when there is different medication to be taken at different times and quantities, I can understand why somebody might miss a session ehre and there.
My mum was insulin dependent and very reliable and well controlled, but she would if she was somewhere different, quite often forget her insulin unitl after a meal or even bedtime when she did a routine test and found herself too high.