More Silicon Valley executives, even top brass, are using drugs on the job, a trend that puts general counsel and board members in an extraordinarily difficult spot, legal observers and academics say.

The Wall Street Journal recently documented the trend, saying Tesla CEO Elon Musk and Google co-founder Sergey Brin are among those who take psychedelics and similar substances, such as magic mushrooms, Ketamine and LSD. Many executives “microdose,” a quantity insufficient to produce a mind-bending hallucinatory effect, believing the drugs maximize mindfulness and are a gateway to business breakthroughs.