Hi sir am Varsha, 23 age, height 5.4, 40 kg, i need to Gain my weight three month i have taken nutrigain but no use my friend was using Dexona and Practin she gained 5 kg within two month then she stopped but within 15days she lost weight, now am going to take same tablet pls suggest me how many tablet per day i can take? have to before food or after ? then how long i can continue the tablets is it any side effect if i take too long pls help me sir...