I've used oramorph before. I agree with the captain, keep an eye out for the acetaminophen content of your pharms, though I don't think any of the meds you listed have any in them. Take em on a full stomach to reduce the risk of nausea. Those all have CNS depressant effects so be careful as there will be synergism. But yea you should be good, take breaks so you don't get tolerant to them. Hope you continue to feel good!