Are Cymbalta and Lyrica similar? I didn't do any research, but was provided Lyrica for a 7 day "test" for some post Shingles pain. It made me sleepy and "loopy" and I would forget conversations that were had 5 minutes before. Thank goodness it was over Thanksgiving and I wasn't working. I told my doctor I'd take the post Shingles pain any day over that awful feeling. The "side effect" list for Lyrica is long and I would think that anyone who considers that drug for Fibro or diabectic nerve pain should really read hard and consider the side effects before taking it.