The effects of immediate release Adderall last anywhere for 4-6 hours. Tablets usually last about 6 hours, and should not be taken more frequently. Adderall XR’s effects will last a full 12 hours. However, Adderall XR should not be taken more frequently than once every 24 hours, to reduce the risk of potential overdose.
http://prescription-drug.addictionblog.org/how-long-does-adderall-last/
DRUG DESCRIPTION. ADDERALL XR is a once daily extended-release, single-entity amphetamine product. ADDERALL XR combines the neutral sulfate salts of dextroamphetamine and amphetamine, with the dextro isomer of amphetamine saccharate and d,l-amphetamine aspartate monohydrate.
http://www.rxlist.com/adderall-xr-capsules-drug.htm
The ADDERALL XR capsule contains two types of drug-containing beads designed to give a double-pulsed delivery of amphetamines, which prolongs the release of amphetamine from ADDERALL XR compared to the conventional ADDERALL (immediate-release) tablet formulation.
http://www.rxlist.com/adderall-xr-capsules-drug.htm
19 Oct 2009. 20 mg time release typically last 8-12 hrs. I have been on both immediate and time release. Time Release just gives you that kick periodically throughout the day but I kinda found it to wear off after like 6 hrs. Votes: +0.
https://www.drugs.com/answers/how-long-do-time-release-20-mg-adderall-capsules-105488.html
Adderall® is now available in an extended release version that lasts for 24 hours, called Adderall XR® (an abbreviation for eXtended Release). Adderall XR® is an extended-release version of the drug that only needs to be taken once daily and is only indicated for childhood and adult ADHD, not narcolepsy.
http://www.adultadhd.net/adderall/
Because the actual name for generic Adderall XR is very long (dextroamphetamine saccharate, amphetamine aspartate, dextroamphetamine sulfate, and amphetamine sulfate extended release capsules), the name for generic Adderall XR will usually be shortened in various ways to fit on your prescription label.
http://mental-health.emedtv.com/amphetamine-dextroamphetamine-extended-release/generic-for-amphetamine-dextroamphetamine-extended-release.html
Also, the high is a little ''higher'' :\ with IR then with XR. Adderal XR results in a more even and ''highless'' release then Adderall IR and takes a little more time to kick in. People wanting to simulate lets say, 20mg XR of Adderall should administer half the IR dose and the other half 3 hours later.
http://www.addforums.com/forums/showthread.php?t=94567
Adderall comes in 2 main formulations: IR(instant release) and XR(extended release). The IR and well as the XR formulation have the same chemical payload to deliver: 37.5% - Dextroamphetamine Sulfate. 25.0% - Dextroamphetamine Saccharate. 12.5% - Dextroamphetamine Aspartate Monohydrate.
http://www.addforums.com/forums/showthread.php?t=94567
Time for Adderall® to take Effect. Although the time required for Adderall® to take effect may be different for each individual, instant-release drugs in this class generally take 1 – 3 hours. The amount of instant release Adderall® in the bloodstream peaks at about 3 hours.
http://www.adultadhd.net/adderall/
Immediate release versions of Adderall last for 4-6 hours and require repeated dosing. Extended release Adderall XR lasts a full 12 hours but should be taken ONLY ONCE every 24 hours. More here on how Adderall affects the body and brain, and how long its effects last. Plus, a section for your questions about Adderall’s duration at the end.
http://prescription-drug.addictionblog.org/how-long-does-adderall-last/
time release adderall
The time release of Adderall is between 4 to 6 hours. Release time of Adderall is 4 to 6 hours.