Yes, any pain killer can shut the digestion down. It varies from person to person how extreme that slowing will be. At least now you have learned your tolerance level and will be able to predict future transit times if you have to take pain medication again. Antibiotics will also reduce output.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free