Yes, stopping Adderall can sometimes cause weight gain. Adderall is a stimulant medication that can reduce appetite and cause weight loss, particularly in people who take it for an extended period. When people stop taking Adderall, they may experience an increase in appetite, which can lead to weight gain. Additionally, the body may be adjusting to the lack of the medication and returning to its normal metabolic rate, which can also contribute to weight gain. However, it’s important to note that weight gain is not a guaranteed side effect of stopping Adderall, and other factors such as changes in diet and physical activity can also impact weight.