Learn about drug interactions between diclofenac sodium oral and prednisone oral and use the RxList drug interaction checker to check drug combinations. WebMD provides information about interactions between Diclofenac Potassium Oral and nsaids-aspirin-ssris-snris. Diclofenac Potassium (Cataflam); Diclofenac Sodium (Voltaren); Etodolac (Lodine); Indomethacin (Indocine); Ketoprofen (Orudis); Ketorolac. We studied 1057 people who take Prednisone and Diclofenac sodium from FDA. Drug interactions are found. See what they are, when they happen and for. Effects of co-administered dexamethasone and diclofenac potassium on pain, swelling and trismus following third molar surgery.