hi, my son's 11 and he's been on risperdal nearly a year as part of his medication, it has a side effect that makes you feel hungry all lot of the time, my son has gained weight, but he's under supervision so it's under control, the gluten wheat free diet, can really benefit some kids a friend of mine her kids come off risperdal as the diet has helped her kids behavour so much, but you have to be incredabily focused and make sure you stick to the diet and constantly check products, they also do go through a phase of withdrawal from what they have been used to when starting the diet and sometimes crave certain foods, personally i would stick to your routine you have now with what they eat while starting the medication, which depending on the dose takes approx two weeks to get into the system, it took less than that on my son, but they say two weeks, so after a month you will be able to judge any improvement or possible weight gain, then descide whether you want to try the diet or not. Just a suggestion hope it helps.