Toprol-XL and imo

I am 57 years old, and never had HBP, I went to the cardiologist and told me I have 140/80 and prescribed Toprol XL 25mg. I bought the generic ones. Today is my second week and I did not know that my headaches (never had headaches before), electric chocks ringing ears , breathing problems, were a side effect of this pill until reading all these experiences of so many people. I am going to cut half the dosis and lower it, so I get out of this medicine. The doctor made an EKG and gave me Toprol because my left atrial was big due to untreated HBP. Is there any natural product, better than this killing medicine, please advice.