** Thanks for contacting with your health concern and following is the step wise approach to allay your anxiety: 1. firstly see the package/label for treatment/management of accidental ingestion and call the poison control department for further guidance. 2. As long as you did not swallowed, it won t cause any systemic problem, and at most it will cause only change with taste/texture for some time since cortisone has a bitter taste, just watch for any allergic reaction and if ingested may/might cause stomach upset-diarrhea. 3. till then make a mixture of baking soda and water [neutralizer] for gargles followed by good new brushing and throw away your previous toothbrush. 4. It won t kill you just will take sometime to clear, hope this helps