The true effects of the drug soon appeared, however, and it turned out to be not only severely addictive, but also to cause severe respiratory paralysis in overly large doses.
Raunveruleg áhrif efnisins komu hins vegar fljótt fram en efnið reyndist ekki eingöngu verulega ávanabinandi heldur olli það einnig alvarlegri öndunarlömun í of stórum skömmtum.