Y do drugs have opposite effect on me? opiates make me energized and stims like ritalin (methylphenidate) make me tired and anxious. what does this say about my body?

Prone to Addiction: As we have discussed with you in the past this is what addicts report. I would bet you are genetically disposed to addiction and are not the only member of your family with addiction problems.

Idiosyncratic reaction: This is called an idiosyncratic or paradoxical effect. Many people who get in trouble with opiates have your condition . These conditions most definitely are genetically based and have to do with complex changes or development of neuro receptors in your brain and how they react . There's not a lot to be done about it except be highly aware of what you found out and share this with your doctors.