Complex sentence: Clonazepam was the second most frequently implicated benzodiazepine in ED visits, however, it should be noted that alcohol alone was responsible for over twice as many ED visits than clonazepam in the same study.
Split into simpler sentences: Clonazepam was the second most frequently implicated benzodiazepine in ED visits. However, it should be noted that alcohol alone was responsible for over twice as many ED visits than clonazepam in the same study.