Hello, I had gone through your question carefully and i will try my best to resolve your query. Practin (cyproheptadine) is commonly used as an appetite enhancer and it can increase your weight also. But this kind of drugs should always be taken under the prescription of a doctor to avoid its misuse or addiction or side effects. Practin on long term use can cause stomach upset, sleeplessness, dizziness and even blurred vision, so it should not be taken for long term. As you were using it for more than a year and possibly these symptoms (nausea, belching, etc.) are the side effects of this drug, so i would recommend you to stop using practin. Instead you can take healthy diet containing green leafy vegetables, citrous fruits, milk and milk products, protein rich diet and also have some kind of exercise in form of walking. These all will be very beneficial to you in long run and you will be protected from side effects of any such medications. Hope this answers your question and let me know directly if you have any further relevant queries, i will be happy to guide you further.