Hello, probably not but it depends on your usual blood pressure levels. If you ve had high blood pressures then stopping diovan and taking the less potent metoprolol might worsen your readings. On the other hand, if you ve had low blood pressures (less than 110mmHg systolic) then adding another anithypertensive medication might cause hypotension or symptoms of postural hypotension. In any case you should contact the cardiologist again for the necessary clarifications. Until then you should follow the aforementioned rule . I hope you find my answer helpful! You can contact me again, if you d like any clarification or further information. Kind Regards!