Just out of curiosity, if there's anyone else here who takes 30 mg adderall xr daily, how long does it generally last you? This is what I am prescribed, and I've found that overall I generally get a good six hours before I gradually start to wind down. Unless I haven't taken it for awhile, (for about 9 months I was on a different insurance that didn't cover adderall, so i was only able to fill my prescription a couple times) which has caused me to still be wide awake at 4 am after taking it at 9 am. Anyways, just curious what it does for other people.

I get about 6 hours out of an xr dose. I take it twice a day but have no insurance. After the last increase in January I started splitting a 30mg XR and taking in with generic adderall. You can by empty capsules at Wholefoods. I do 15mg XR 2 times a day (every 6 hours) and take a generic every 3 hours (half a 20mg). This is to equal 20-25 XR twice a day.

I don't know exactly. I take mine in the morning around 8 am right after I eat. I have this feeling when I take it. I like it cause it lets me know if I forgot to take it or not. That feeling doesn't go away until late in the afternoon unless I eat a lot that day. It probably has more to do with what I eat but I haven't pin pointed it yet because I don't always eat the same things. I do know if I drink any caffeine it wears off sooner for me. Luckily I only drink caffeine if I am really thirsty and nothing else is available where I am. I know I could drink water in those situations but sometimes water just isn't what I want esp if it isn't ice cold. Sometimes it seems to wear down faster if I am overly active that day for me. I have found out that if I am going to exercise I should wait until late in the day or do it before I take it in the morning. It's harder for me to exercise first because I am not as motivated off meds but maybe that will change once I get to exercising more regularly again. When it becomes more regular for me to exercise it is easier for me to stick to it than it is when I haven't for a while. Lately I haven't because I have been sick. When I am not sick one of my daughters is. It's been going on a month now! UGH!

Anyway, In the late afternoon... I'd say around 5pm I don't feel it anymore but I still know it is working just not as well. As far as my mood is concerned it works all day. I tend to get really irritable on days I miss a dose.

Don't know if that helped you any or not lol.

I only take 20 mg but mine works for 3 hours, then I crash for 2 hours, up again for another 3 and then crash for the rest of the day...so 6 or 8 hours, depending on how you look at it.

I definitely need to up the dosage and I'm hoping that would take care of the 2 hour crash. If I drink 1/2 of a 5 hour energy shot during the 2 hour crash, it helps with the extreme tiredness I get. I have a son whose 10 months, so I HAVE to still be functioning. Without that extra energy shot, I'm done for!!!