Hi and welcome to Healthcaremagic. I understand your concerns. Well, biliary stones and alchohol are the most common but not the only causes of pancreatitis. It may be caused by metabolic issues such as hyperlipidamia, hyperglicemia or hypercalciemia. Also, some medications may cause it as well so these should be checked by his doctor. . However, at this point it is improtant for him to recover as soon as possible andthen right cause can be established. He should later check his hormonal and calcium levels and in next 2 months have low fat diet. I hope I have answered you query Kindly regards. Wish you a good health.