Which statement about methylphenidate is true?

• A. It may increase hypertensive crisis when taken with MAOIs.
• B. There are no interactions with any medications.
• C. It cannot be used with caffeine.
• D. It reduces anticoagulant effects.

Answer: (A)

The key idea here is how stimulant medications interact with monoamine oxidase inhibitors. Methylphenidate boosts levels of norepinephrine and dopamine in the brain, while MAO inhibitors block the breakdown of these monoamines. Together, they can cause a dangerous surge of norepinephrine, leading to a hypertensive crisis with dangerously high blood pressure, rapid heart rate, and other serious cardiovascular effects. Because of this risk, coadministration is typically contraindicated or requires careful medical management and a washout period.

The other statements aren’t correct because there are known interactions with various medications (not just this one), caffeine is not an absolute contraindication though it can amplify stimulant effects, and there isn’t evidence that methylphenidate reliably reduces anticoagulant effects.