Tapering means slowly lowering your dose over time instead of stopping all at once. When your doctor prescribes dexamethasone, you may also be given a plan to slowly lower your dose over time.
When you take this steroid for more than a short time, your body may slow down its own production of natural steroids. If you stop too quickly, your body may not have enough steroids to work properly. This is called adrenal insufficiency.
Tapering gives your body time to adjust and start making its own steroids again. Stopping suddenly can also cause steroid withdrawal syndrome, even when your adrenal glands are working normally.
Never stop taking the medicine without talking to your doctor first.