It effects people differently but expect nausea and fatigue for a week or so. That’s normal and it will go away once your body adjusts. I switched prescriptions after about a year because it didn’t help me but I know people that thrive on it so definitely give it a chance to work. Also eat snacks throughout the day even if you aren’t hungry and keep a glass of water nearby for dry mouth
If it’s extended release take it like an hour before you need to be up and moving. I used to set an alarm for when I needed to take it, fall back asleep, and wake up almost an hour on the dot. In my case this was the best part about taking a stimulant cause I’m a sleepy girl and I LOVE the snooze button