Is it possible for mixing like 20mg of clonazepam and 30 mg of risperdal to cause a overdose?

The only reason that: I can think of that someone would ask that question is if they were planning to hurt themselves. When people announce that, even on an anonymous website, I view it as a call for help. I strongly urge you to get mental health counseling, either by telling your primary care provider that you are having these thoughts or going to an emergency department. Hotline help available at 1-800-784-2433