My son, 56, took risperidone 2 mg for yrs, (no weight gain, VERY few side effects, except fatigue and headaches); primary care physician two yrs ago increased to 3mg (hoping to stop voices-did not stop "voices" but kept them at a minimum, much better than 2mg). But, he has now developed side effects: elbow joint pain/numbness on left side of face. Have others experienced this? If so, what meds have they substituted that have little side effects: little weight gain, etc.