I was recently switched from taking 20mg adderall twice a day to now taking 30mg Vyvanse once a day. The adderall was no longer working which is why I wanted to try the switch. I’ve only been taking the Vyvanse for about 5 days now but I feel very tired and have no motivation to get anything done. I have ADHD withought hyperactivity and have always struggled with lack of concentration, focus, motivation, and low energy. Every day is a struggle to a productive.. I understand my doctor wanting to start out at a low dose but how long should I wait to address my concerns?