Misplaced half my prescription for amphetamines, pharmacy won't replace them. Can i just substitute with my leftover vyvanse?

Obviously if the doctor switched me off vyvanse it's not ideal. I'm having serious executive disfunction and it's going to be weeks until they let me refill.

I don't remember the brand name of the one I'm supposed to be taking but if it's important I'll get the chemical name off the bottle.

Priority 1 is still finding the bottle but garbage bag man needs his pills.