4-FA after Vyvanse

[frontbluntt]

I took 60mgs of Vyvanse yesterday and 40 mgs of Vyvanse two days before that (three days ago).
If I take 4-FA today will the effects be severely diminished? Or is it so strong that it shouldn't make too much of a difference?
Should I overdose just slightly?
I am not a regular stimulant/Vyvanse taker. I have taken 4-FA plenty of times in the past and know my dose.

 

[frontbluntt]

Welp I went ahead and went for it so I guess I'll post back later and answer my own question for anyone else wondering.

 

[frontbluntt]

....aaaaannnndddd it works fine.

EDIT: Probably wouldn't have hurt to preemptively over dose.