Complex sentence: Benzodiazepines, including diazepam, oxazepam, nitrazepam, and flunitrazepam accounted for the largest volume of forged drug prescriptions in Sweden 1982-1986, a total of 52% of drug forgeries were for benzodiazepines, suggesting benzodiazepines were a major prescription drug class of abuse.
Split into simpler sentences: Benzodiazepines, including diazepam, oxazepam, nitrazepam, and flunitrazepam, accounted for the largest volume of forged drug prescriptions in Sweden 1982-1986. During this time, a total of 52% of drug forgeries were for benzodiazepines, suggesting benzodiazepines were a major prescription drug class of abuse.