A woman who almost got her friend arrested for doing her a favor will serve three months in jail for fraudulently obtaining drugs.The woman, Stephanie Vargas, was directed to serve 90 days of a three-year sentence, perform 50 hours public service work, and must forfeit her TennCare benefits on charges of fraudulently obtaining drugs and fraudulent use of TennCare benefits.The sentence comes after Vargas changed a prescription her doctor had written her for Barclofen. She added a prescription for Loritab which the doctor had not written her, penciling it in to the written prescription. The pharmacy, upon seeing the prescription, could not make out how many refills were permitted so the pharmacist called the doctor.