Well I've tried it a couple times (150mg Wellbutrin IR an hour prior) and all it did was smooth both the come up and comedown. Coming down of cocaine have never been so easy. Zero anxiety while coming up, peaking, or coming down without messing up the high. Absolutely no need to call on benzos as you come back to baseline as it wears off instead of feeling like total crap.
Tho I loved the combo, I did only one regular line while on Wellbutrin in both cases, so bingers out there, be precautious.