Supreme Court Justice Ruth Bader Ginsburg, who had cancer surgery earlier this year, was kept at a hospital overnight after she became drowsy and fell from her seat aboard an airplane. Court officials blamed a reaction to medicine.

Ginsburg was taken to Washington Hospital Center around 11:15 p.m. Wednesday by paramedics and released Thursday morning, court officials said.

Ginsburg, along with Chief Justice John Roberts and justices Stephen Breyer and Antonin Scalia, was heading to London to take part in ceremonies marking the opening of Britain's new Supreme Court.

"Prior to the plane taking off, the justice experienced extreme drowsiness causing her to fall from her seat," a court statement said. "Paramedics were called and the justice was taken to the Washington Hospital Center as a precaution."

The statement said doctors attributed her symptoms to a reaction caused by the combination of a prescription sleeping aid and an over-the-counter cold medicine.

Ginsburg was still in Washington Thursday morning, court officials said. It was not clear whether she would still attempt to make the London trip.