I took Effexor 75 for 12 years . After losing another husband to a tragic accident, Dr increased to Effexor 150. After almost a year, I was still having serious depression. From Effexor XR 150 to 75mg for 2 weeks started Cymbalta 20 mg. Having every side effect possible including tachycardia . Not sure if it's withdrawal from Effexor or the new Cymbalta!!! I really want to feel better. I feel awful. Today is my 5th day on Cymbalta .
Waiting to hear back from my Dr. In not sure he will know either .