"i have been on vyvanse 30 mg for a year now and have had success taking it. i can work full time, have time management, take great care of my kids and keep my house clean. i sleep just fine at night. i do get irritable throughout the day if i don&#039;t eat. i feel nauseous and sick if i don&#039;t snack and stay hydrated. hate to say it but it also worsens my anxiety slightly in the morning. pros have outweighed the cons. as for weight loss i lost 7 pounds when i started taking it but have stayed at 130 pounds same weight for a year i am 5&#039;5 and 28 years old. i feel healthy."