No, amitriptyline is not a controlled substance.
Amitriptyline is a tricyclic antidepressant (TCA) that is not classified as a controlled substance by the FDA or DEA. The medication is available by prescription but does not fall under the Controlled Substances Act scheduling system 1.
Regulatory Classification
Amitriptyline is FDA-approved as an antidepressant medication that works by inhibiting the reuptake of norepinephrine and serotonin in neurons 1. While it requires a prescription for dispensing, it lacks the regulatory restrictions applied to controlled substances such as:
- No DEA scheduling (Schedule I-V classification)
- No special prescription requirements (e.g., no triplicate forms, no refill limitations beyond standard prescription rules)
- No mandatory reporting to prescription drug monitoring programs
Clinical Context
The drug is widely prescribed off-label for multiple conditions including:
- Chronic pain management (gastroparesis, neuropathic pain, chronic low back pain) at doses of 25-100 mg/day 2
- Migraine prevention at 30-150 mg/day 3
- Insomnia disorder at low doses of 10-20 mg 4
- Irritable bowel syndrome starting at 10 mg with titration up to 30 mg 5
Important Caveats
While not a controlled substance, amitriptyline does have abuse potential. Case reports document recreational abuse, with patients using 100-200 mg daily doses specifically because the drug does not appear on standard urine drug screens for narcotics 6. This abuse potential exists despite its non-controlled status.
The medication carries significant side effects including anticholinergic effects (dry mouth, constipation, blurred vision), sedation, weight gain, and QTc prolongation 2, 7. These risks necessitate careful prescribing and monitoring, though not the regulatory oversight required for controlled substances.
Prescribers should dispense amitriptyline in tight, light-resistant containers and store at controlled room temperature 1, but these are standard pharmaceutical requirements rather than controlled substance regulations.