Oral Steroids for Bell's Palsy
For adults and adolescents 16 years and older with Bell's palsy, prescribe oral corticosteroids within 72 hours of symptom onset using either prednisolone 50 mg daily for 10 days OR prednisone 60 mg daily for 5 days followed by a 5-day taper. This is a strong recommendation based on high-quality randomized controlled trials showing significant improvement in facial nerve recovery 1.
Treatment Algorithm for Adults (≥16 years)
Timing is Critical
- Within 72 hours of onset: Strong evidence supports corticosteroid use
- After 72 hours: Benefit becomes unclear and less certain 1
Dosing Regimens (Choose One)
Two evidence-based options exist:
- Prednisolone 25 mg twice daily (50 mg total) for 10 days - simpler regimen
- Prednisone 60 mg daily for 5 days, then taper over 5 days - front-loaded approach
Both regimens demonstrated efficacy in landmark trials. The Sullivan trial showed 83% recovery at 3 months with prednisolone versus 63.6% with placebo (P < .001), improving further to 94.4% versus 81.6% at 9 months 1. The Engström trial with 829 patients confirmed significantly shorter recovery times with prednisolone 1.
What About Antivirals?
Do NOT prescribe antiviral monotherapy - it provides no benefit over placebo 1.
Adding antivirals to steroids is optional based on clinical judgment and patient preference 1. Some smaller trials suggest marginal additional benefit (96.5% vs 89.7% recovery), but evidence quality is lower and the effect size modest. This is a shared decision-making scenario where the small potential benefit must be weighed against cost and side effects.
Pediatric Considerations (<16 years)
For children, the evidence is substantially weaker. No controlled trials exist specifically for pediatric Bell's palsy 1. However, recent 2025 meta-analysis data suggests corticosteroid monotherapy may improve recovery rates beyond 1 month in children 2.
Practical approach for children:
- Discuss with caregivers that evidence is limited
- Children have higher spontaneous recovery rates than adults
- If treating, use similar dosing adjusted for weight
- Emphasize this is based on extrapolation from adult data and favorable benefit-harm ratio, not pediatric-specific evidence 1
Common Pitfalls to Avoid
Delayed treatment: The 72-hour window is evidence-based. Don't wait for "watchful waiting" - early treatment matters 1
Prescribing antivirals alone: This is explicitly contraindicated and provides no benefit 1
Inadequate dosing: Use the full evidence-based doses (50-60 mg daily equivalent), not lower "conservative" doses
Forgetting eye protection: Patients with impaired eye closure need aggressive eye care (artificial tears, nighttime ointment, taping) to prevent corneal injury - this is a strong recommendation 3
Strength of Evidence
The corticosteroid recommendation is based on Grade A evidence from multiple high-quality, double-blind, placebo-controlled randomized trials totaling over 1,300 patients 1, 4. This represents some of the strongest evidence in facial nerve disorder management.
Newer research from 2024 comparing IV methylprednisolone to oral prednisolone shows faster 1-month recovery with IV treatment, particularly for severe cases (Grade 4), but no difference at 3 months 5. This suggests oral therapy remains appropriate for most patients, reserving IV treatment for severe presentations where faster initial recovery is prioritized.
The bottom line: Oral corticosteroids within 72 hours are the evidence-based standard of care for Bell's palsy in adults, with clear mortality and morbidity benefits through improved facial nerve recovery and reduced long-term disability.