Hi Thanks for posting your query. I can appreciate your concern for the safety profile of Becoactin syrup. It is approved only for the treatment of allergic conditions, there are safety concerns if it is used for other conditions like to increase the appetite in children. The most common side effects are drowsiness (sleepiness), confusion, blurring of vision, dry mouth, constipation, increased heart beats, etc. You must encourage him for eating, avoid giving chocolates, toffees, ice creams or soft carbonated drinks frequently as they may suppress his appetite, do not force him to take food, let him get hungry and ask for foods, cultivate the habit of having foods all together at the same time. Use of Becoactin in this age for appetite is not advisable and required too, he will eat according to his needs, and not to satisfy you. Hope the suggestions given above could be useful in getting him eat properly without taking Becoactin. Kindly rate this answer, if you are convinced.