Originally Posted by hoserpilot

On a short term basis, the FAA allows use of corticosteroids at a total dose of 20 mg or less of prednisone per day provided there are no side effects. Initial treatment with steroid dose packs, at a total daily dose of greater than 20 mg is not allowed for flight duty use. Chronic steroid use is authorized on a case-by-case basis. As mentioned above, the underlying condition being treated by steroids is the key issue with the FAA. A wide variety of medical problems are treated with steroids. Conditions such as poison ivy are not aeromedically significant, whereas conditions treated with steroids such as multiple sclerosis or asthma would restrict the pilot from flying until waived by the FAA.