Vermont is now the fourth state to legalize physician assisted suicide. Gov. Peter Shumlin. signed it into law Monday.
The law allows doctors to prescribe a lethal dose of medication to terminally ill patients.
Vermont joins Oregon, Washington and Montana in adopting such a measure.
Opponents are concerned the law could eventually target the disabled and the elderly.
"Physician-assisted suicide does not affirm the life or dignity of individuals facing serious illness or death," Dr. Charmaine Yoest of Americans United for Life said.
"Instead, it opens the door to abuses and dangers for extremely vulnerable individuals," she charged.