There is no weight restriction  to use the abortion pills. If you are overweight it is recommended that you use the same regimen, no additional medication is necessary.
 WHO. Frequently asked clinical questions about medical abortion. Retrieved from: https://www.womenonweb.org/en/media/inline/2012/6/5/who_medical_abortion.pdf
*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.