Should You Administer Steroids in Uncomplicated Bell's Palsy?
Yes, you should prescribe oral corticosteroids within 72 hours of symptom onset for patients 16 years and older with uncomplicated Bell's palsy. This is a strong recommendation based on high-quality randomized controlled trials showing significant improvement in facial nerve recovery 1.
The Evidence for Steroids
The recommendation is built on two landmark randomized, double-blind, placebo-controlled trials:
Sullivan et al. (551 patients): 83% of patients treated with prednisolone recovered facial function at 3 months versus 63.6% with placebo (P < .001). At 9 months, recovery rates were 94.4% versus 81.6% 1.
Engstrom et al. (829 patients): Demonstrated statistically significant shorter recovery times in the 416 patients treated with prednisolone compared to 413 who did not receive it 1.
The absolute benefit is substantial: steroids increase the probability of facial nerve recovery by approximately 12.8%-15% 2. This translates to meaningful improvement in quality of life by reducing the risk of permanent facial asymmetry, synkinesis, and psychosocial disability.
Specific Dosing Regimens
Use one of these evidence-based protocols 1:
- Prednisolone 50 mg daily for 10 days, OR
- Prednisone 60 mg daily for 5 days, then taper over 5 days
Both regimens require at least 5 days at high dose and must be initiated within 72 hours of symptom onset. The benefit after 72 hours is unclear and not supported by the trial data 1.
What About Antivirals?
Do not prescribe antivirals alone - they are no better than placebo 1, 3.
You may offer antivirals (such as valacyclovir or acyclovir) in addition to steroids based on shared decision-making, but counsel patients that any benefit is likely modest at best (possibly <7% additional improvement) 2. The evidence shows equilibrium of benefit and harm for combination therapy 1, 3.
Special Population: Children
The evidence for children is weaker. While children show higher spontaneous recovery rates than adults, oral steroids may be considered given the presumed similar disease mechanism and favorable benefit-harm ratio 1. However, a recent 2025 meta-analysis suggests corticosteroid monotherapy in children may improve recovery rates beyond the first month 4. Involve caregivers heavily in the decision-making process 1.
Critical Pitfalls to Avoid
Confirm the diagnosis first: Bell's palsy is a diagnosis of exclusion. Rule out stroke (forehead sparing suggests central lesion), Lyme disease, Ramsay Hunt syndrome (look for vesicles), tumors, and trauma through history and physical examination 1.
Don't delay treatment: The 72-hour window is critical. Patients presenting after this timeframe have unclear benefit from steroids 1.
Implement eye protection immediately: For patients with impaired eye closure, prescribe artificial tears during the day and lubricating ointment at night, with eye taping if needed. This prevents corneal injury 3.
Avoid routine testing: Do not order routine laboratory tests or imaging for typical Bell's palsy presentations 3. Reserve MRI for atypical features: bilateral palsy, recurrent episodes, gradual onset, other cranial nerve involvement, or failure to recover after 3 months 1.
When to Reassess or Refer
Refer to a facial nerve specialist if 3:
- New or worsening neurologic findings at any point
- Ocular symptoms develop
- Incomplete facial recovery 3 months after onset
The 2013 American Academy of Otolaryngology-Head and Neck Surgery guideline provides the most comprehensive framework and remains the standard of care 1, recently reinforced by 2026 Korean guidelines 5 and contemporary reviews 6.