hi, doctor, i am taking valprol cr 500 since 2007, i am working abroad but i bought medicines from india to country where i work , this time when i came for vacation , my valpric acid levels were low, so doctor told me in india to take 2 tabs 500 mg in night and 1 tab 500 mg in morning, how long i should take this. i am outside india now after vacation, does prolonged use or life long use of valprol cr 500 will have any side affects on our body. Ahmed- doha