Can I mix Adderall immediate-release tablets with extended release capsules?

I'm having trouble getting things done that i need to, and my friend has Adderall immediate-release tablets AND xr capsules. She gave me both to test out and i was wondering if it's okay to use both? not at the same time obviously, but like every-other day or smt.|||yes, there is no problem doing that as long as they are taken aprox the same time. Make sure not to mix them at the same time on the same day. too much ampheitimine will definatly not help you focus, quite the oppisite. |||I'm sure it'll be ok.