Thanks ladies! I took him off the medication a few days ago. He didn't finish the 10 days.
I'm still worried about him and I think I need to take some time off from work and get serious with the vet.
His diarrhea is still hanging around. He'll have a regular bowel movement and then a few minutes later, diarrhea.
This morning he showed no interest whatsoever in his food. he just looked at it and went back to lie down.
Something is wrong and I don't know what. I need to call the vet, bring in a stool sample, and get some blood tests done. Enough scr*wing around. I have some money saved and I think this is what I will need to spend it on.
I can't sleep at night worrying about him. I have no idea what it could be.