 In Period 2, multiple oral doses of clarithromycin will be administered twice daily BID for 4 consecutive days with a single oral dose of deflazacort coadministered on the morning of Day 4 Treatment D. Pharmacokinetic sampling for 21 desacetyl-DFZ and, if data permit, deflazacort will be taken for 24 hours following deflazacort dosing on Day 4. 