Is Seroquel (Quetiapine) a Controlled Substance?
No, Seroquel (quetiapine) is not classified as a controlled substance by the FDA. 1
Regulatory Classification
The FDA drug label explicitly states: "SEROQUEL is not a controlled substance" 1. This means quetiapine is not scheduled under the Controlled Substances Act (Schedule I-V), unlike benzodiazepines (Schedule IV) or other drugs with recognized abuse potential that require special prescribing restrictions 2.
Important Clinical Caveats
Despite not being controlled, quetiapine has documented abuse potential that clinicians must recognize:
The FDA label acknowledges: "SEROQUEL has not been systematically studied, in animals or humans, for its potential for abuse, tolerance, or physical dependence" and warns that "patients should be evaluated carefully for a history of drug abuse, and such patients should be observed closely for signs of misuse or abuse" 1
Real-world abuse patterns exist, particularly in correctional settings and among individuals with prior substance use history. Intravenous quetiapine abuse has been documented since 2005, with cases of diversion for recreational purposes 3
All documented abuse cases have involved patients with prior substance abuse history 3
Clinical Implications
Because quetiapine lacks controlled substance classification:
- No special DEA prescribing requirements apply (unlike Schedule IV drugs like benzodiazepines or phentermine) 2, 4
- Standard prescription monitoring is sufficient from a regulatory standpoint
- However, clinical vigilance is warranted in patients with substance use disorders—monitor for drug-seeking behavior, dose escalation, and tolerance development 1
The non-controlled status may lead some clinicians to underestimate diversion risk, but the evidence clearly shows quetiapine can be misused, particularly by vulnerable populations 3, 5.