He was given a high does of motion sickness medication by the staff which caused him to have a heart attack on his second day under the 'care' of Scientologists who work there.
If you don't become a Scientologist at Narconon, watch out for the lease agreement that is contingent of the 'student' passing a drug test. Parents end up paying for months of rent at a place their child cannot live. This is how Narconon really makes their money.