Oral Treatment for Bell's Palsy
For adults and adolescents ≥16 years with Bell's palsy, prescribe oral corticosteroids within 72 hours of symptom onset—specifically 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
Primary Treatment: Oral Corticosteroids (MANDATORY)
The evidence is unequivocal: oral steroids are the cornerstone of Bell's palsy treatment and should be initiated as early as possible, ideally within 72 hours of symptom onset. 1
Dosing regimens (choose one):
- 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
The evidence supporting steroids is robust: 83% of patients treated with prednisolone achieved complete recovery at 3 months versus only 63.6% with placebo (p<0.001), and this benefit persisted at 9 months (94.4% vs 81.6% recovery). 1, 2 The number needed to treat is only 6 patients to achieve one additional complete recovery. 2
Critical timing consideration: Treatment benefit after 72 hours is unclear and substantially diminished. 1 Do not delay—every hour counts in the first 72-hour window.
Antiviral Therapy: Context-Dependent Decision
DO NOT prescribe antiviral monotherapy—it is no better than placebo. 1, 3 This is a strong recommendation against based on high-quality RCTs showing valacyclovir alone provided no benefit over placebo. 1
You MAY add antivirals to steroids in specific circumstances:
- Severe facial paralysis (complete paralysis at presentation)
- Ramsay Hunt syndrome or suspected varicella-zoster involvement
- Patient preference after shared decision-making
The evidence for combination therapy is mixed. While some smaller trials showed modest improvements (96.5% vs 89.7% recovery at 6 months), larger high-quality trials found no significant benefit. 1 The guideline classifies this as an "option" with equilibrium of benefit and harm—meaning it's neither strongly recommended nor contraindicated. 1, 3
If adding antivirals, use:
- Valacyclovir 1000 mg three times daily for 7 days, OR
- Acyclovir 400 mg five times daily for 7-10 days
Special Population: Children (<16 years)
For pediatric patients, the evidence is insufficient to make a strong recommendation. 1 Children have higher spontaneous recovery rates than adults, and no controlled trials support steroid use in this age group. However, given the similar disease process and favorable benefit-harm ratio, oral steroids MAY be considered with significant caregiver involvement in decision-making. 1
Common Pitfalls to Avoid
Do NOT order routine laboratory testing (including Lyme serology unless endemic area with appropriate exposure history) 3
Do NOT order routine imaging (CT/MRI) at initial presentation—imaging is only indicated for atypical features: recurrent paralysis on same side, isolated branch involvement, other cranial nerve deficits, or failure to recover after 3 months 1, 3
Do NOT prescribe antivirals alone—this provides zero benefit and wastes resources 1, 3
Do NOT delay treatment waiting for specialist consultation in straightforward cases—primary care can and should initiate steroids immediately 1
Prognostic Factors Indicating Poor Outcome
Be aware that certain features predict incomplete recovery and may warrant more aggressive consideration of combination therapy:
- Treatment delay >7 days from onset (RR 18.87 for poor outcome) 6
- Complete facial paralysis at presentation (RR 5.01) 6
- Hearing deficits (RR 3.01) 6
- History of recurrence (RR 3.75) 6
- Diabetes (particularly with retinopathy/nephropathy) 7
Mandatory Adjunctive Care
Eye protection is non-negotiable for patients with impaired eye closure: artificial tears during day, lubricating ointment at night, eye taping or moisture chamber at night. 3 This prevents corneal injury and is a strong recommendation based on clinical rationale.
Follow-Up Requirements
Reassess or refer to facial nerve specialist if: 3
- New or worsening neurologic findings at any point
- Ocular symptoms develop
- Incomplete recovery at 3 months post-onset
The contemporary evidence from 2024-2026 continues to support this approach, with recent guidelines from Japan and France reinforcing systemic corticosteroids as the primary treatment and antivirals as optional adjuncts in severe cases. 4, 8, 5