Hi, Purpose and duration of taking omnacortil not mentioned. Omnacortil (prednisolone) is a corticosteroid commonly prescribed to treat a wide range of health problems including allergies, blood disorders, bronchial asthma, skin diseases, infections, certain cancers and to prevent organ rejection after a transplant. It can increase the risk of cataracts, osteoporosis, diabetes mellitus, and delirium, which are more common and more dangerous in the elderly population. It may also cause a variety of psychiatric symptoms, including dementia, that are reversible on drug discontinuation. In view of the above if the benefits of using omnacotil are more than the risks of above mentioned side effects, it may be continued in low doses preferably on every alternate days and for a short period of time to minimize the risk of those side effects. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr. Mohammed Taher Ali, General & Family Physician