An inquest has opened in Gloucester into the death of 16-year-old boarding school pupil.
Jack Bowlby was found dead in his room at Cheltenham college in October 2012.
The well-known young horse rider was the nephew of racing trainer Jenny Pitman.
The inquest has heard he had been taking the acne treatment drug Roacutane and that one of its affects can be mood changes.
The inquest is expected to last for two days.