It isn't just opinion, you have to wean off of steroids (unless it's a very small dose). Suddenly stopping can cause serious harm and even death, because only by tapering off do you get your body to start making its own steroids again.
This isn't at all related to addiction. Sometimes we use addiction and dependence interchangeably, but they're not. Once you've tapered completely off the drug, you don't continue to "crave" prednisone. Tramadol (a non-narcotic pain reliever) sometimes gets the same bad rap. It can cause more dependence, yet is less addictive than stronger narcotic medications. Many people who stop it suddenly or who miss a dose will experience nausea and headaches (definitely true for me). So to go off it you do have to taper. However, it doesn't create a psychological high (except perhaps in ridiculously high doses, as I have heard that some people who abuse narcotics find a way to abuse tramadol - though it would generally make you sick before it made you high).
It's an important distinction, because when you have a condition that requires a drug that causes dependence, the last thing you need is for others (and yourself) considering you "addicted." I've had friends and family make comments about both the prednisone and the tramadol (more about the tramadol, something about taking any pain medication makes some people nervous) - so I had to educate them.


