I am LOLing about forgetting to keep a record. I have the same problem. You KNOW it is a good idea. You TOTALLY intend to do it. But you know… ADHD.
You know what is helping me? I have given up feeling bad that I forget stuff!!! I’m sick of being discouraged. I started a notebook. I keep it in my living room. If it takes me three days to remember to log my meds, well I do my best to remember and fill in what I know. Maybe logging meds isn’t what works for you. That is OK, too.