After a night of drinking. the next morning i would take my ritalin (methylphenidate) and my hands would get numb, tingly and turned it a bit. what causes this?

Adverse ; Withdraw: The adverse effects of each drug are also amplified when the two are used in combination. Regular side effects and withdrawal symptoms include abdominal pain, appetite loss, anxiety, blood pressure or pulse changes, dizziness, headaches, nausea, and even psychosis. These effects are far more pronounced when both medications are taken in high quantities. Overdose is likely to result in even greater.