The maximum dose of vyvanse is 70 mg /day. Since you have taken it by error. I would suggest you to wait and relax. Drink plenty of water. If you notice any untoward side effects like face swelling, rashes, chest pain, difficulty in breathing or swallowing,fast heartbeat immediately rush to a health center. Kindly pay attention to the dosage when you take medicine s in future. Take care.
Next Steps
Drink plenty of water, relax , watch for side effects.