Don't suggest you made him depressed. You didn't. People with depression tend to externalize blame. You DO NOT want to take responsibility for causing his depression. You didn't. I suppose you could bring about in a roundabout way if he brings up IC on his own whether the IC has mentioned depression or anything and leave it at that? Some ICs don't. They just keep them coming back forever and never send them for meds even if they would benefit from it.