I don't know what's up with this lately, but every time I take an opiate in the smallest amount, I get bad gut cramps after about an hour or so, then they go away and come back the next day from the single dose! I've used hydrocodone, codeine, oxycodone and morphine over the past 8 years and haven't had this problem. It started a few weeks ago when I was prescribed some codeine for my back problem, but now even 1/2 a Vike sends me into spasms! Anyone else experience this? Is it burnout, intolerance, or what? I got rid of all the codeine and only taken 2 regular vikes over the last week. Gonna try small a small dose of oxy when I get some today and hope for the best. Any ideas?