“…Diclofenac was used in eight studies [ 16 , 21 , 27 , 29 , 30 , 32 , 34 , 38 ], indomethacin in 9 studies [ 15 , 17 , 22 , 24 - 26 , 28 , 31 , 33 , 38 ], while valdecoxib [ 23 ], ketoprofen [ 37 ], naproxen [ 35 ], and celecoxib [ 36 ] were used in one study, respectively. NSAIDs were administered rectally in 14 studies [ 15 – 17 , 22 , 24 – 31 , 33 , 35 ], orally in two studies [ 36 , 38 ], intravenously in two studies [ 23 , 37 ], intramuscularly in two studies [ 21 , 32 ], and intramuscularly and rectally in one study [ 34 ]. NSAIDs were administered pre-ERCP in 13 studies [ 17 , 21 , 23 , 24 , 26 , 28 , 30 , 31 , 33 – 38 ], post-ERCP in six studies [ 16 , 22 , 25 , 27 , 29 , 32 ], during ERCP in one study [ 15 ], and pre-ERCP combined with post-ERCP in one study [ 38 ].…”