Hi welcome & good to see your question. I can advice you that you should not take any medicine even some suggest because there is no specific medicine for this. The only way is high protein diet ( animal foods, dairy, fish, eggs, dals, pulses, etc), & sleep more, try to consume more carbs .Total calorie should 2600-2800kcal/day. If you plan a High protein -diet then can easly gain weight 2-4 kg per month

Hi, You can opt from all the variety of pulses, eggs, white meat I.e. chicken and fish for proteins prepared in less oil with healthy way of cooking methods or any type of healthy preparation like sprouts, steamed or cooked on liw heat with lid. cover. For carbohydrates you can select any of grains in combination in a healthy way of preparation. Select all the seasonal vegetables and fruits of variety around 4 to 5 servings. Atleast 500 ml of toned milk or its products must be included in your daily intake. Keep proper hydration. Avoid readymade foods ,fried foods and refined as well as processed products.