I used to wear Fitbits, but now I have a Garmin Instinct. I never thought to look at my heart rate until I looked at my new watch, despite all of my Fitbits showing heart rate too. My heart rate is 65 bpm without Ritalin and 95 with Ritalin. I can literally see when my Ritalin kicks in, or if I missed my 8am dose (e.g., my heart rate will still be 65 bpm at 9am if I missed it). I think my watch is smarter than me. lol!