My son is 15 years old - tall with 55 kgs weight. He has been diagnosed with juvenile myoclonic epilepsy about 9 months back. He is on valparin chrono 200 mg in the morning and evening. At night he is on lonazep 0.5 mg. He is very active and in sports and games too. He had 4 (less than one minute) seizures in the last nine months. How long must he continue the medication? Is the medication habit forming? Will epilepsy shorten the life of the patient?