Can Epilepsy drug cause behavioural problems!

My daughter first had a seizure on xmas day 2012 when she was 20 months then went on to have 27 more over next 3 days.  At first thought was febrile convulsion as she had temp caused by a chest infection, was sent home on phenobarbital and phenytion as well as being under a consultant. We notice her behavour change, seem more tempermental but as she was coming up to 2 put down to the terrible 2's. They decided to weane off the medication and when they did we notice her behavour improve. She was fine until October 2013 when she had another seizure, back in hospital and ended up having over 40 in next few days as wanted see what happen before giving her the emergency drug to stop the seizures.  She had another chest infection and was discharged under Epilim this time.  As she had a seizure while she had a EEG so she was finally diagnosed with Epilepsy in March 2014.  We notice that her behavour started to get worse again, when she started having tantrams was just no getting through to her.  Discussed this her consultant and said could lower her dosage to 3ml, and she improved and been seizure for free for just over a year until last month when she had one but when took her to doctors found she had bad ear infection (so her trigger seem to be when she unwell) and when he weight her he thought dosage was too low for her weight so got in touch with my consultant and was agreed to increased to 4ml.  But this past week she been in hospital 3 times as she kept having seizures, had to have the emergency drug each time.  At first ear were slightly pink then mid week were more red so was diagnosed with ear infection.  When first admitted into hospital was weight again and said should be at 5ml.  But because she was admitted for a 3rd time her consultant decided to rise it again to 6ml so now worried behavour going get really worse again but of course don't want her having seizures.  Has anyone else found changes in their child behaviour while on epilepsy drugs?