Treatment Recommendations for Bell's Palsy
For adults and adolescents ≥16 years with Bell's palsy, prescribe oral corticosteroids within 72 hours of symptom onset as the primary treatment, using either prednisolone 50 mg daily for 10 days OR prednisone 60 mg daily for 5 days followed by a 5-day taper. 1
Core Treatment Algorithm
Steroids (Primary Treatment - MANDATORY)
The American Academy of Otolaryngology-Head and Neck Surgery guidelines provide a strong recommendation for oral corticosteroids based on high-quality randomized controlled trials showing significant improvement in facial nerve recovery 1:
- Timing: Must initiate within 72 hours of symptom onset (benefit after 72 hours is unclear)
- Dosing options:
- Prednisolone 25 mg twice daily for 10 days, OR
- Prednisolone 60 mg daily for 5 days, then taper over 5 days, OR
- Prednisone 60 mg daily for 5 days with 5-day taper 1
Evidence strength: Two large RCTs (Sullivan et al., n=551; Engstrom et al., n=829) demonstrated that 83-94.4% of patients treated with prednisolone achieved full recovery versus 63.6-81.6% with placebo 1. This represents a 12.8-15% absolute risk reduction 2.
Antivirals (Optional Adjunctive Treatment)
Antiviral monotherapy alone should NOT be prescribed - this is a strong recommendation against, as antivirals alone show no benefit over placebo 1.
Combination therapy (steroids + antivirals) may be offered as an option, though evidence shows only modest potential benefit 1:
- When to consider: Severe cases (complete facial paralysis), older patients, or when viral involvement is strongly suspected 3, 4
- Typical regimen: Valacyclovir or acyclovir added to steroid therapy for 7-10 days
- Evidence nuance: Some smaller trials showed combination therapy achieving 96.5% recovery versus 89.7% with steroids alone, but larger high-quality trials found no significant difference 1. The potential benefit, if it exists, is likely modest at best (≤7% improvement) 2
- Patient counseling required: Patients must understand that antiviral benefit is not established and any benefit is likely small 2
Special Populations
Children (<16 years)
Evidence for steroid use in children is inconclusive, as children show higher spontaneous recovery rates than adults 1. Oral steroids may be considered with significant caregiver involvement in decision-making, given the presumed similar disease process and favorable benefit-harm ratio 1.
Essential Adjunctive Care
Eye Protection (MANDATORY)
Implement eye protection immediately for all patients with impaired eye closure - this is a strong recommendation 1, 5:
- Artificial tears during the day
- Lubricating ointment at night
- Eye taping or moisture chamber if needed
- This prevents corneal exposure and potential permanent eye injury
Critical Pitfalls to Avoid
- Do NOT prescribe antivirals alone - they are ineffective as monotherapy 1
- Do NOT delay steroid initiation - efficacy drops significantly after 72 hours 1
- Do NOT routinely order laboratory tests or imaging for typical Bell's palsy presentation 1, 5
- Do NOT forget eye protection - this prevents serious complications 1, 5
When to Reassess or Refer
Reassess or refer to a facial nerve specialist if 1, 5:
- New or worsening neurologic findings at any point
- Ocular symptoms develop
- Incomplete facial recovery at 3 months after onset
- Atypical features suggesting alternative diagnosis (bilateral involvement, isolated branch paralysis, other cranial nerve involvement)
Practical 7-Day Treatment Example
Day 1-5: Prednisone 60 mg PO daily + eye protection
Day 6-10: Prednisone taper (e.g., 40 mg, 30 mg, 20 mg, 10 mg, 5 mg)
Optional addition: Valacyclovir 1000 mg TID for 7 days (if severe paralysis or shared decision-making favors combination therapy)
The evidence strongly supports steroids as the cornerstone of treatment, with antivirals playing only a potential adjunctive role in select cases 1, 3, 2.