UPDATE: I'm trying the generic of Cymbalta, which is an SSNRI rather than the more common SSRI. The problem is that some SSRIs can cause bradycardia. I took Prozac off and on for decades, and I now have bradycardia. I tried it again last year, and my heart rate slowed steadily and noticeably. That seems to be happening with Cymbalta, too. Resting rate is now around 47, and it's been down to 41 while sleeping. That's a few to several beats lower than normal even for me. I'm trying to make it through two weeks to see if my body adapts.