Is mixing gabapentin with adderall safe?

Caution with mixing: Gabapentin and Adderall have essentially opposing effects, so it may not make sense to take the two of them together. It is always important to use caution when mixing medications. I would suggest you confirm with your prescribing doctor how he/she means for you to take the medications.

You do not reveal why you are taking either medication. Although gabapentin has few drug-drug interactions, it does cause drowsiness and sedation, where Adderall should result in wakefulness and alertness. So, the side effects could cancel each other. This is not a good mix, and you should discuss this with your doctor(?s).