Under terms of a plea deal reached Friday, John Andrew Weldon, 28, pleaded guilty to tampering with a consumer product and conspiracy to commit mail fraud.
He admitted forging a prescription from his father, an OB/GYN physician, and changing the label on the medication's container to make the drug, Cytotec, appear to be the common antibiotic amoxicillin, the Tampa Tribune reported.
Welden was accused of giving the medication to Remee Jo Lee, who was six or seven weeks pregnant. She lost the baby within several days, the newspaper said.
Welden could have faced a mandatory life sentence without parole if he was convicted of murder under Florida's "Unborn Victims of Violence Act," the charge brought when we was arrested in May.
The plea agreement calls for a prison term of 13 years and six months. He will be formally sentenced Dec. 5, court records said.