UPDATE: MADISON, Wis. (AP) -- The state Senate has overwhelmingly approved a bill that would make it legal to use a marijuana extract to treat seizures. The measure legalizes possession of cannabidiol oil with a doctor's certification. The chamber adopted the bill on a 31-1 vote Wednesday. Republican Sen. Duey Stroebel was the only senator to vote against it. Parents of children who suffer from seizures say cannabidiol oil, which doesn't produce a high, can ease symptoms. Democratic Sen. Chris Larson argued the bill doesn't go far enough, pointing out that importing the oil into Wisconsin would remain illegal. He tried to amend the bill to allow production of the oil in the state but Republicans refused to revise the measure. The bill goes next to the Assembly. -------------------------------------

The Wisconsin state Senate is poised to pass a bill to legalize possession of a marijuana extract used to treat seizures.

The Senate was scheduled to take up the measure Wednesday.

Lawmakers set the groundwork in 2014 by making it legal to possess cannabidiol oil if used as a part of a doctor's trial.

But no trials have taken place in Wisconsin and parents of children who suffer from seizures have urged lawmakers to expand the law.

A fix stalled in the Senate last session after three Republicans feared it would lead to marijuana legalization. At least one of them supports this year's version, which allows possession with a doctor's certification.

The bill must pass the Assembly and be signed by Gov. Scott Walker before it becomes law.