Should you tell the parents about their teenage son's illicit drug use?

When it comes to younger patients, it can be hard to know where a GP’s duty lies

Henry is a 15-year-old boy who presents with an unexplained leg injury. He has a swollen knee and cut on his shin that needs four sutures. He is not sure how the injury occurred.

While doing a HEADSS (home, education, activities, drugs, sexuality, suicide) screen it becomes clear that Henry uses illicit drugs. 

Henry lives with his parents, who are in the waiting room. He is worried about their response to his drug use.

When you call them into the consultation they say they are suspicious of Henry’s drug taking