As promised here's the interaction between Klonopin and Cymbalta and Gabapentin (moderate interactions but point being not going to offset the action of Klonopin i.e if anything all three together should fuck you up!

):
View detailed report of drug-drug and drug-food interactions for Klonopin, Cymbalta, gabapentin
www.drugs.com
And how did the word "buzz" creep in here? I thought we were dealing with legit treatment for anxiety here. Just saying. And this has been a hot topic around here i.e. this business of benzodiazepine "buzzes" i.e. as to whether or not that's even possible or it's very highly subjective as to what constitutes a "buzz". Point I'm trying to make if you're waiting for a "buzz" don't hold your breath. Just managing your expectations! Could be a long wait is my point. You'll fall asleep before you get a "buzz" (in theory i.e. no way you cannot "feel anything" if the stuff is legit) (and I don't know how you're going to sort this out with the pharmacy i.e. word of advice going to the pharmacist and telling them that they're not working because there's no "buzz" not a good idea).
On the other hand maybe here's the smoking gun (Gabapentin):
"Other side effects of Neurontin include mood or behavior changes, depression, or anxiety."
Neurontin (gabapentin) is an anti-eleptic medication used to treat seizures that occur with epilepsy, as well as nerve pain associated with shingles. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more.
www.rxlist.com