My dad was released from a 3 days hospital stay on Sunday. He was diagnosed with Acute pancreatis. He's been prescribed Apo-Sulfatrim Ds 800mg. However within 1 day he ended up back in hospital complaining of severe stomach pains. He spent the night again in hospital and was release again today saying that he's going to have to suck it up.. My dad is no stranger to pain so I have to think its serious enough to warrant my concern. He lives alone without any contact from anyone besides myself and I'm affraid that something worse could happen. Could he be allergic? I'm planning on going to visit him to see on his condition tonight, I'd like to know what kind of signs to look for if something is wrong.