my son ( 10 years ), he is consulted neurologist and EEG report showing normal and MRI report says focal Seizure. he is having some problem with hand first and right part of whole body, that is some time his stuck.frequency is very less, most of the time it happens once in a month. doctor now suggested to take VALPARIN CHRONO 300 MG TAB, is there any side effects on taking this medicine,