Sunday marks an end to paper prescriptions in New York State.
A new law requiring e-prescribing goes into effect over the weekend.
The move is part of an effort to reduce the overprescribing of opioid pain killers in the state.
Lisa Nelson, associate director of Pharmacy at the University of Rochester Medical Center, says that many doctors have been using electronic prescriptions for years.
"Greater than ninety percent of the prescription that we do here at the University of Rochester but the hospitals in the inventory have been e-prescribed," says Nelson.
Friday, Dr. Joseph Maldonado, President of the Medical Society of the State of New York, criticized the move. He calls it burdensome to prescribers.