Nabilone Dosing and Available Strengths
Nabilone is available as 1 mg oral capsules, with dosing initiated at 1 mg twice daily and titrated up to a maximum of 2 mg four times daily (8 mg/day total). 1, 2
Available Formulations
Dosing Regimens
For Chemotherapy-Induced Nausea and Vomiting (CINV)
Starting dose: 1 mg twice daily
Titration: Up-titrate as needed
Maximum dose: 2 mg four times daily (8 mg/day total) 1
The ASCO guideline specifically recommends this dosing for refractory CINV due to moderate to highly emetogenic chemotherapy, using nabilone as a salvage antiemetic when standard therapies fail.
Dosing Approach: "Start Low, Go Slow"
- Begin at the lower end of the dosing range (1 mg twice daily)
- Titrate gradually based on therapeutic response and tolerability 1
- Peak plasma concentrations occur within 2 hours of oral administration 2
- The plasma half-life of nabilone itself is approximately 2 hours, though metabolites have a longer half-life of about 35 hours 2
Important Dosing Considerations
No dose adjustments required for:
Key clinical caveat: While no formal dose adjustments are required, adverse effects and drug interactions can be significant dose-limiting barriers, particularly in older adults with cancer who often experience polypharmacy 1. The most common dose-related adverse effects include drowsiness, dizziness, vertigo, euphoria, and dry mouth 1, 2.