Now, I do not consider this to be medical advice for pigs. I was just using what I had on hand at the time: drugs, cake and juice.
The day before yesterday I gave him a choc chilli cupcake laced with a temazepam just so he could get some rest and stop hurting for a while. I also gave him a couple of litres of cranberry juice. Yesterday, I gave him another cupcake for breakfast and I dug his grave. His appointment with the vet was for 4pm. At 3pm I squished 4 temazepams into the icing of another cupcake so he would be doped up for the drive into town and went down to his pen. And for the love of cupcakes! He got up and almost barrelled me over. I was so happy I started crying again (I had been crying for 2 days). Called the vet, who is also shocked and amazed and we've given him a few more days to recover. No more drugs, just more juice and more good lovin' should do the trick.