Table 1 Badalov classification system of drug-induced acute pancreatitis [5]

Class Ia drugs

At least 1 case report with positive re-challenge, excluding all other causes, such as alcohol, hypertriglyceridemia, gallstones, and other drugs

Class Ib drugs

At least 1 case report with positive re-challenge, however, other causes, such as alcohol, hypertriglyceridemia, gallstones, and other drugs were not ruled out

Class II drugs

At least 4 cases in the literature and consistent latency in at least 75% of cases

Class III drugs

At least 2 cases in the literature with neither consistent latency among cases nor re-challenge

Class IV drugs

Like class III drugs, but only one case report had been published, without re-challenge