Maximum Nighttime Dose of Cyclobenzaprine
The maximum nighttime dose of cyclobenzaprine for adults is 10 mg, taken as a single bedtime dose. 1
Standard Dosing
According to FDA labeling, the standard dosing regimen for cyclobenzaprine is:
- 5 mg three times daily (most patients)
- May increase to 10 mg three times daily based on individual response 1
When specifically used at nighttime as a single dose, the maximum would be 10 mg at bedtime.
Special Populations Requiring Lower Doses
Elderly Patients (≥65 years)
- Start with 5 mg and titrate slowly upward
- Elderly patients have approximately 1.7-fold higher drug exposure compared to younger adults
- Elderly males show the highest increase (2.4-fold), while elderly females show more modest increases (1.2-fold) 1
Hepatic Impairment
- Mild impairment: Start with 5 mg and titrate slowly
- Moderate to severe impairment: Not recommended (drug exposure doubles in hepatic impairment) 1
Important Clinical Considerations
Anticholinergic effects are dose-dependent and include:
- Hallucinations, confusion, drowsiness
- Constipation, urinary retention, dry mouth
- These effects are particularly problematic in elderly patients 2
Drug interactions to avoid:
- MAO inhibitors: Risk of serotonin syndrome 2
- Sedatives and anesthetic agents: Additive CNS depression 2
Duration of therapy: Use for periods longer than 2-3 weeks is not recommended 1
Emerging Evidence for Bedtime Dosing
Recent research on sublingual cyclobenzaprine formulations (TNX-102 SL) demonstrates efficacy at 5.6 mg as a single bedtime dose for fibromyalgia, with significant improvements in pain and sleep quality 3, 4. However, this is a different formulation designed for rapid transmucosal absorption and is not equivalent to standard oral tablets 5.
For standard oral cyclobenzaprine tablets used at bedtime, do not exceed 10 mg as a single nighttime dose, with 5 mg being the appropriate starting dose for elderly or hepatically impaired patients.