CBD is considered compatible with Vyvanse, as there are no known interactions or contraindications between the two. It is recommended to start with the lowest possible dose of CBD and gradually increase if needed. In terms of improving sleep hygiene, it is important to take Vyvanse in the morning, avoid screens at least an hour before bedtime, establish a consistent wake-up time, keep the bedroom for sleep and intimacy only, avoid looking at the clock during the night, limit daytime naps, avoid stimulants like coffee in the afternoon, and use calming activities if unable to fall asleep after 15 minutes. These strategies may take up to two weeks to see results. If sleep issues persist, it is advisable to seek medical advice.