Hello Sir, I Would Be Grateful To Get Your Guidance

Hello Sir,

I would be grateful to get your guidance to maintain my weight. I am actually 23yrs old and my weight is just 55kg. I am also suffered with cold allergy. So one day one of my friend suggested me to take Decdon and Practine Tablets to increase weight instantly. So now i wanna know will it be good for me to maintain my weight and fitness. If you have any better idea then please guide me, I am looking for a best and instant treatment.