I was diagnosed with sustained ventricular tachycardia (rapid bea...

I was diagnosed with sustained ventricular tachycardia (rapid beat at rest) on June 19th and immediately put on Toprol 50mg. It has only been a month and I have gained 5 pounds and my weight rarely changes. I just had cardiac catheter ablation on July 18th and slowly weaning off of the toprol with my doctor. I was on 25mg after the ablation but I was able to cut that in half yesterday. I am hoping to lose this weight, I HATE IT! Does anyone know if you can lose this weight after stopping Toprol?