Final answer:
Methylphenidate is the medication used for ADHD that has been associated with liver damage.
Step-by-step explanation:
The medication used for ADHD that has been associated with liver damage is methylphenidate. Methylphenidate is a stimulant drug often prescribed to treat ADHD and narcolepsy. While it is generally safe when used as directed, rare cases of liver damage have been reported. It is important for patients taking methylphenidate to be aware of the signs of liver damage, such as yellowing of the skin or eyes, dark urine, or persistent nausea, and to consult their healthcare provider if they experience any of these symptoms.