What Dosage Of Sharkoferrol Is Advisable For Weight Gain In Children?

Hi, my son is 9 years old and he weights only 45 pound and height is 50 inches. I am really concern about his weight and one of my friend and realtive doctor told to give sharkoferrol syrup to gain weight. I want to know how much sharkoferrol should I give him in a day and is there any side effects in ginving shakoferrol to childrens?Also can you guide me how to gain atleast normal weight for my son? Hiral.