OKLAHOMA CITY (AP) — A judge has struck down an Oklahoma law requiring doctors to follow label instructions when prescribing abortion-inducing drugs, finding the rule is unconstitutional because it doesn’t apply to other kinds of medication.

District Judge Patricia Parrish invalidated the law, which Gov. Mary Fallin signed last year. It had prohibited off-label uses of abortion-inducing drugs by requiring doctors to administer them only in accordance with U.S. Food and Drug Administration protocols.

A lawsuit the New York-based Center for Reproductive Rights filed on behalf of two Oklahoma groups — including an abortion provider — argued the law placed unconstitutional restrictions on non-surgical abortion in the earliest weeks of pregnancy and interfered with doctors’ discretion. Opponents argue lower dosages can make the abortion-inducing drugs more effective later in a pregnancy.