Remember to drink water (and electrolytes) on ADHD meds!
Probably applies to most meds though, tbh. I started on Adderall like a month and a half ago. I was a good girl and drank lots and lots of water like the doctor ordered, because Adderall dehydrates the hell outta me and gives me baaad dry mouth.
Turns out it's not such a great idea to drink 4 or 5 32oz bottles of water a day without making sure you're not messing with your electrolyte levels. For 4 days (1 of which was an off-meds day) my heart rate was all over the place. Just standing around, it would jump from 90 to 145, down to 115, etc. Walking to the kitchen made me winded.
I was waiting for my psych to call me back, but in the meantime Dr. ChatGPT suggested I might want to try an electrolyte supplement, so I did and wham bam, thank you ma'am, stable heart rate at my normal resting rate within a couple hours of my first bottle.