Switching medications because of trouble sleeping: does the new option usually fix it?

Not always, no, though it's a reasonable first thing to try. Sleep trouble from stimulant medication is often related to dose timing or how late in the day the medication is still active, so adjusting the dosing schedule or switching to a shorter-acting formulation is frequently tried before switching medications entirely. If sleep issues persist despite timing adjustments, switching to a different stimulant or adding a non-stimulant like guanfacine in the evening are further options, but none of these are guaranteed fixes, since sleep difficulty in ADHD can also stem from the underlying condition itself, not just the medication. If the change is persistent, distressing, or affecting daily functioning, contact your provider through the FasTreat portal rather than changing medication on your own. References: https://www.caddra.ca/wp-content/uploads/Canadian-ADHD-Practice-Guidelines-4.1-January-6-2021.pdf