A case of bells palsy on steroids shows no improvement after 2 weeks; the next step in management should be:
Vasodilators and ACTH
Physiotherapy and electrical stimulation
Increase steroid dosage
Electrophysiological nerve testing
This appears to be the most reasonable and appropriate action to be taken once the initial steroid therapy is failed. Ref: Diseases of ENT By PL. Dhingra, 4th Edition, Pages 92-95