Early on when taking these drugs (hormones), you can simplistically think of the medication as "supplementing" your body's own production of corticosteroids. With time, your body realizes you are getting all of the corticosteroids you need in pill or intravenous form, and your body sends a message to stop producing your own natural corticosteroids. If these drugs are suddenly stopped, you not only are not getting the prescription, but it can take a significant amount of time before your body realizes that it needs to make its own corticosteroids again.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking any of these medicines, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.