Oxycodone would get me constipated when I had a UC flare. But, it would all come back with a vengeance so I wouldn't recommend it as a solution for diarrhea.

In a sense that's what Lomotil is. Diphenoxylate is chemically related to the other opiates (morphine, codeine, etc.) but has more of a constipating property and much less pain control. Lomotil can control withdrawal symptoms for people addicted to opiates (though it would be silly to use it that way).

I took Norco after takedown for a couple of weeks on and off for pain. Didn't seem to help any to slow the bowels-but I am currently taking Lomotil and it's a lifesaver!

All prescription narcotics/opiates (Norco, Tramadol, Morphine, Oxy, etc) are known to slow the bowels. Yes, it has had this effect on me back when I was taking it for UC pain and a bit after my surgeries, but it is NOT a good drug to rely on for this purpose as it is highly physically addictive. The last time I quit taking Norco, I had bad withdrawals including fever, chills, cold sweats, and headaches to the point where I had to go back on it and then slowly taper down off of it again.

If you're just looking to slow the bowels and not necessarily control pain, use something different like Immodium, Metamucil (psyllium husk), or BRAT diet.