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At this age and height your weight is much less and require increasing the weight.
No medicines are available for gaining weight.any person or company claims for increasing weight is baseless.
Important is that you should have well nourished balanced diet.

Eat every three hours.
The sweet taste of fruit and mint juice can rouse your appetite.
Banana is one of the most calorie-rich fruits.
You need to include the right mix of protein, carbohydrates and fats in your diet. dairy products like milk, cottage cheese,nuts,protein bars,Legumes, tofu are some protein-rich foods. Rice, potatoes and sweet corn are some carbohydrate-dense foods. You also need to gain some fat which can be done by garnishing your meals with butter, olive oil or cheese. Milk and dairy products are very good source of fat and other important nutrients needed for weight gain.
Do exercises that work your whole body.
don't use any powder only well balanced diet help in increasing your weight.
Water intake 3-4 liters in a day. PLEASE DO NOT SKIP ANY MEAL.
first of all you have to increase your appetite.
Avoid going long periods of time without eating.
Gradually eat more food each day.
Keep a food diary.
Exercise It will help you build muscle and increase your appetite. Your body may compensate or even overcompensate for the Calories that you burn exercising.
Consume a variety of different foods at mealtime.
Choose high-Calorie, high-nutrient foods that are less filling.
Make mealtime pleasant.
Use larger cups, plates, bowls.
Alternatively, try eating smaller portions if a large meal seems daunting.
Drink more Calories. Have a caloric beverage with every meal.

Thankyou.