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.
2 doctors agreed: Sudden weight loss: There are many medical conditions that can cause sudden weight loss. For example and over-active thyroid, stomach and bowel issues, and the list goes on.How much weight are you losing and how long has it been going on. Of course you must see your doctor to discuss this.