I have serious heart palpatations and breathlessness. I didn't re...

I have serious heart palpatations and breathlessness. I didn't realize it was this drug until I reduced dosage to 12.5mg after being hospitalized, all symptoms stopped. Then I doubled it again not knowing that was my problem. Then serious heart problems began again and unstable on my feet, hot face, weakness, sleeplessness, nervousness, feet and leg cramps. I've had all of these problems the 3 years that I have taken this drug and didn't know why until now. I'm 68 years young.