A dangerous prank that backfired is now the subject of a lawsuit.

A Kansas City woman who says she drank a soft drink laced with laxative is suing the Family Dollar store where she bought the drink.

Police say one of the store’s employees put laxative in the drink as a prank against another employee and put it in the employees’ lounge on September 10.

However, the targeted worker noticed the laxative tablets and allegedly put the bottles back into a cooler intended for customers.

Barbara J. Nelson says she became ill after realizing something was wrong and returning to the store. She was treated at a hospital for dehydration and cramps.

A spokesman for Family Dollar says the company doesn’t comment on pending litigation.