Final answer:
Controlled substances cannot be prescribed 'for office use' as each prescription must be for a specific patient with a legitimate medical need, according to the CSA under the TDDA.
Step-by-step explanation:
According to the Drug Enforcement Administration (DEA), under the regulations of the Controlled Substances Act (CSA), prescriptions for controlled substances are to be issued only by a practitioner for a legitimate medical purpose and in the usual course of their professional practice. The term 'for office use' is typically not associated with the individual patient prescriptions required under the TDDA (Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970), which includes the CSA. This implies that controlled substances cannot be prescribed 'for office use', as each prescription must be for a specific patient with a legitimate medical need. However, practitioners may obtain controlled substances for office use through different channels, such as a DEA Form 222 for Schedule II drugs or through other authorized means for Schedules III-V, but not via a prescription.