Adrafinil at tail end of vyvanse?

[aspiringchemist]

I take 60mg vyvanse daily. The noticeable effects really taper off for me around 6 hours post dose. I can and do fall asleep.

I've seen the threads discussing concurrent use of amphetamine and adrafinil/modafinil creating a canceling effect.

Would taking a dose of adrafinil when the vyvanse begins to lose effect help with maintaining focus, not crashing etc?

Thanks