I'd advise you to not stop the medication
without first consulting with your physician. Metoprolol
is often the first line of medication offered for PAC's, PVC's, SVT, etc. I found it totally ineffective with any of these problems. It did however lower my BP, slow my cardiac rate, and made SVT episodes easier to convert. Also, the dose you are taking is small, so there is room to adjust. I "zombied out" at 200mg.