Does Prolomet Cause Any Side Effects?

hi ,i am 45 yrs old and hypertensive since last one yrs.i was taking meto er 12.5.since last one week my bp shot up to150/100.now i have been suggested prolomet am 50.after taking it only for a day my bp came down to 110/70.is it ok to use it and what are its sideeffect