Missouri senators have reversed course after mistakenly voting to restrict a drug used for medical abortions.

Senators voted unanimously Tuesday to pass legislation requiring pharmacies to keep an electronic log of drug sales, including of people buying cold medications containing pseudoephedrine. Those drugs are a key ingredient in methamphetamine.

Included in that bill was a House provision that placed the abortion drug RU-486 in the same restricted category as heroin and marijuana. Sen. Norma Champion (R-Springfield) said that section was supposed to have been removed from the Senate version.

But no senators noticed that it was still in the bill until after they had passed it.

So senators rescinded their vote, removed the section and passed the bill again. It now goes back to the House.