I have a 24 year old son who was prescribed Risperidone last Saturday. He's been taking it as prescribed since then. 1 Mg morning 2 mg at night. Today he has a rash above his eye. 1. Will the rash go away or does he need to stop the medication. He has not been confirmed to be shizophrinic yet. The Doc want to rule out marijuana first. He has stopped using pot for about a week, so we hope to see some behavior change in a few days. 2. How long does it take for behavior to improve when on Risperidone ?