My 12 y/o cousin has severe ADHD and he is now on aderall and ritalin (methylphenidate) and he can barely get out of bed? What can be done?

Need to. Discuss with prescribing physician regarding dose adjustments or using other options or changing the medicines.
ADHD. Adderall & Ritalin (methylphenidate) at same time? . Recommend discussing this with his prescribing doc.