Hello, Facial palsy is caused by dysfunction of cranial nerve no 7 ( facial nerve ) Facial palsy is caused by brain Tumor,strokes,Lyme disease etc but most of the time the cause is unknown and then it is called as bell s palsy. More than 85% cases of recover within 3 weeks even without treatment. Some may take few weeks to months for recovery,however in 3 to 4% cases,the recovery is poor. Thete is no special treatment for bell s palsy but use of steroids like prednisolone may help in initial stages,specially if given within three days. I would advise you not to stop omnacortil of your own and you must consult your doctor for this. Anti viral drugs generally have no effect. I hope it helps. Thanks