In August 2017, former UFC heavyweight champion Junior dos Santos tested positive for diuretic hydrochlorothiazide, which is part of the USADA banned substance list. This infraction had caused him to be pulled out of his scheduled UFC 215 fight against Francis Ngannou, and subsequently slapped with a suspension.
Things took a turn for the better for “Cigano”, however, when he was given clearance to resume his career in late April. The decision was made after it was found that he, along with Antonio Rogerio Nogueira and Marcos Rogerio De Lima had taken contaminated supplements that led to their respective drug test failures.