I donk know any of the circumstances around this, but do know that recently I had a very strong student "Freeze" and then put in some rapid nonsensical control movements resulting in a heavy landing and some nosewheel damage. He said afterwards that his wife, a doctor, would say "I told you so" and had told him not to fly when he has been taking Codral and he had been feeling anxious and disorientated.
During the insurance claim process I was told anecdotally that all recent claims have involved (mostly non prescription) medication.
I am now making it a much bigger deal than before with students that they must tell me if they are taking any medication especially if it ends in -eine. Including excess coffee or cigarettes.