I Am 35 Years Married Female...I Take Epilex Chorine 300mg..want

i am 35 years married female...I take epilex chorine 300mg..want to know its side effects...and sometimes I skip having medicine...doctor has advised me to have it twice a day....I had mild epilepsy during childhood but over the years it had subsided...suddenly I had a stress attack last 7 months back and hence have started having this medicine...does it have anything to do with weight gain