How long does adderall xr really last? because it definitely doesn't feel like it lasts over 5-6 hours for me and it's frustrating but my doctor claims vyvanse (lisdexamfetamine) lasts longer but likely won't be covered by insurance. is this true?

Yes!: everyone metabolizes medication differently, so the effects can last longer or shorter than average. Vyvanse, (lisdexamfetamine) which is a prodrug that is changed to adderall type, last longer, around 10-12 hrs on the average. Some insurances require you try a generic before approving a brand(newer) medication. Discuss it with your Doctor.

Coverage depends ...: Check out http://www.drugs.com/pro/adderall-xr.html which states "The mean elimination half-life for d-amphetamine is 10 hours in adults; 11 hours in adolescents aged 13-17 years and weighing less than or equal to 75 kg/165 lbs; and 9 hours in children aged 6 to 12 years." Check out http://en.wikipedia.org/wiki/Lisdexamfetamine which lists half-life of active drug as 10-13hrs. So they appear same

May be inadequate: You need the stimulant effect during the most constructive time of the day, Stimulants are not the only answer to the attention deficit disorders. You might want to consider other psychological and social measures needs to be addressed. You may either need increased dose of adderall (dextroamphetamine and racemic amphetamine) xr or consider adderall (dextroamphetamine and racemic amphetamine) in divided doses.

Hmm: Vyvanse (lisdexamfetamine) has a half life of

Need dose adjustment: The effect of Adderall XR should last 8 to 10 hours if the dose is right for you. Speak to your doctor about an increase in the Adderall dose, until you reach at least 8 hours. If you need longer coverage, you can take a shorter acting Adderall tablet just before the morning dose wanes.. That is usually covered by insurance and can give you the same effect as Vyvanse (lisdexamfetamine).

Variable: Adderall coverage varies not only with how the individual metabolizes the drug, but also the severity of ADD/ADHD. Have seen a wide range of dosage for these reasons. Vyvanse (lisdexamfetamine) should be covered by insurance after a trial on Adderall. However, have seen many who do just as well on Adderall (XR alone or combined with a short-acting dose). Not unusual to take a while to get the dose right. Take care.