My son, aged 28, Post Graduate, started taking Valparin Chrono from 1997 two tabs a day of 200mg,every morning and at night gradually increasing to three tabs of 500 mg one in the morning and two at night up to 2010. There after he started Valance 250 every morning & 750 mg every night increasing to 500 mg every morning and 750 mg at night in 2012. During the period he had about 5 fits of epilepsy mainly due to missed doses. Presently he is taking Valance 500 every morning and 750 every night. What are the side effects of the medicine? How can it be minimised?