i had a bout with very high blood pressure the last few weeks and although it has usually been controlled for some years already with 5mgs dynacirc daily and an additional dynacirc ( i get isradipine generic ) when necessary and additional metaprolol, it did not seem to be helping now, i was wondering since i had just received a new prescription for isradipine if there was a connection, my pharmacy said that they are allowed to give meds. with a minimum one month expiration date, can there be a connection? My doctor just switched me to 160mgs valcertin once a day and metaprolol 25 mg. once a day., which seems to be keeping the pressure low.