 Ethylphenidate metabolizes into methylphenidate and ritalinic acid.Tiny amounts of ethylphenidate can be formed "in vivo" when alcohol (also known formally as ethanol) and methylphenidate are coingested, via hepatic transesterification.Ethylphenidate formation appears to be more common when large quantities of methylphenidate and alcohol are consumed at the same time, such as in non-medical use or overdose scenarios.