Do not take more or less of it or take it more often than prescribed by your doctor. 10 mars 2017 · In 2010, benzonatate received attention when it was assigned a black-box warning because the capsules resemble candy, which may be desirable to young children (11– 14). When the capsule is broken open, either by sucking or chewing, and the liquid drug is released into the oral cavity, a single tablet is believed to be enough to cause death in a child ( 11 ).