In Summary. Common side effects of Vyvanse include: insomnia and irritability. Other side effects include: dizziness, weight loss, and xerostomia. See below for a comprehensive list of adverse effects. For the Consumer. Applies to lisdexamfetamine: oral capsule.
Examples of involuntary weight loss include the weight loss associated with cancer, malabsorption (such as from chronic diarrheal illnesses), and chronic inflammation (such as with rheumatoid arthritis).eight loss: Weight loss is a decrease in body weight resulting from either voluntary (diet, exercise) or involuntary (illness) circumstances.
Rapid unintentional weight gain may be due to medication side effects. Many cases of unintentional weight gain are harmless. But some symptoms experienced along with rapid weight gain may signal a medical emergency. What causes unintentional weight gain? Pregnancy. The most common cause of unintentional weight gain is pregnancy. But many women do intentionally eat more to support the growth of the baby. During pregnancy, most women put on weight as the baby grows.