Helloo.. Please do not take any of these medications.None of them help in weight gain. What you can do instead is watch your diet eat well and eat healthy because even with steroids that help you gain weight you need to eat heavy to put on some mass ,the steroids or weight gain powders and tablets just give you an extra egde that is they work well only with a proper diet and exercise.By the way stuff which help you in mass gain are anabolic steroids and not the ones like dexona its meant for other purposes in medicine. Follow these tips: 1.Eat small meals every 3-4 hours ( so 4-5 small meals a day) 2.Have a 100 grams of protein a day mainly frm chicken , fish , eggs etc. 3.Drink plenty of water 4.Join a gym and enroll in a mass gain training program. 5.Add a whey protein powder to your diet preferably of optimum nutrition 100% whey. 6.Be consistent with your training and diet You should see pretty good gains in a month or so if you follow the regimen stricly. Thank you and take care.