Anaphylaxis with Bentyl?

I had been prescribed Bentyl to be used with the spasms that I have been having in my bile duct. No stone in the duct from the MRCP, I have not had the gallbladder in 8 years as well. Anyway, is there any other antispasmotics that I could try since I had an Anaphylactic reaction to the Bentyl after taking one pill from the prescription? I am going back to the GI doctor next week after I am done with the Prednisone.