Get emergency medical help if you have signs of an allergic reaction to Vyvanse: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
signs of heart problems - chest pain, trouble breathing, pounding heartbeats or fluttering in your chest, feeling like you might pass out;
signs of psychosis - hallucinations (seeing or hearing things that are not real), new behavior problems, aggression, hostility, paranoia; or
signs of circulation problems - numbness, pain, cold feeling, unexplained wounds, or skin color changes (pale, red, or blue appearance) in your fingers or toes.
Seek medical attention right away if you have symptoms of serotonin syndrome, such as: agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.
Vyvanse can affect growth in children. Tell your doctor if your child is not growing at a normal rate while using this medicine.
Common Vyvanse side effects may include:
dry mouth, loss of appetite, weight loss;
sleep problems (insomnia);
fast heart rate, feeling jittery;
dizziness, feeling anxious or irritable; or
nausea, vomiting, stomach pain, diarrhea, constipation.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Vyvanse side effects (more detail)
