"i have been taking vyvanese for about 21 months. i have been taking 30 mg and will not up it. i am 63 and sought help after reading some blogs about older adults taking this to help focus and have more energy. i have never really taken any medication my whole life. i take it mainly on work days and if off or on vacation i generally don&#039;t take it. on this blog it sounds like a lot users have other issues. anyways this medication has worked wonders for me, makes me more sociable, happy and able to continue concentrate. i work as an engineer. i follow my doctors recommendation in taking it first thing in the morning with food. it generally wears off about 4-5 pm, no sleep problem. i highly recommend for older adults but keep dose low."