It is not recommended to use abortion pills if you are not pregnant, but if this occurs you may experience cramping and temporary side effects. It is advised to do a pregnancy test prior to using the pills, because otherwise it will be difficult to know if you were not pregnant, or if the pills simply did not work.
*Nothing provided herein should be construed as professional medical advice and no medication / pills should be used without a prescription from a licensed / registered medical practitioner eligible to prescribe such medication in your local jurisdiction.