We're stupid, but at least we're honest about it. They're stupid, but at least they have the decency to not act like it out in broad daylight.
Wrong comparison. People from the US are stupid and proud of it. There's nothing honest coming from the US except bombs.
Edit: I missed that you mentioned this in your original post. Nevermind!
Big drug mixture warning: be careful mixing Vyvanse/Adderall and fluoxitine/Prozac. Fluoxitine can end up making the effects of amphetamines stronger than normal, even for Vyvanse.
Normally, because Vyvanse is a pro-drug that requires enzymatic degradation to become active, the only effect a higher dose will have is a longer effect. Fluoxitine affects interactions with the active drug and how long it is in your system, overriding the pro-drug effect. This can lead to (likely minor) overdose effects. You'll be able to tell if this is happening because you'll get similar side effects as are often experienced with Adderall that you normally don't experience on Vyvanse. Think of the ones normally associated with Adderall IR.
This doesn't mean they can't be mixed, just that you should watch how you react to the doses of each when mixing. You may find that you need to reduce your dose of Vyvanse if you go to a high enough dose of fluoxitine.