An Oklahoma woman was shocked to discover the wrong pills inside a sealed medicine bottle.

Amber Johnson made the troubling discovery after purchasing over-the-counter medicine at a Wal-Mart in Mustang, Oklahoma on Jan. 11. When she needed the pills the next morning, she discovered crushed up pills inside that were different than what was advertised.

“[There was] nothing wrong the box or bottle, completely sealed, the glue’s sealed, the silver foil on the top was still sealed, just like any of the previous bottles I’ve purchased before,” she said. The pills were supposed to be small, green tablets. Instead, they appeared similar to chopped up antacid. 

Johnson contacted the manufacturer to try to get to the bottom of the incident.

“Once they transferred me to the manufacturer, they asked me several questions, got the information on the box, and they seemed about as shocked as I did,” she said.

The pills had the Tums brand name written on them — a brand that isn’t manufactured at the same plant as the Equate pills she thought she purchased.

“It doesn’t make sense that a pill that’s not made at that plant can be put in the bottle, unless it was brought in by some outside source, otherwise I have no idea … A joke? A prank?” she told KFOR.

She now hopes that others who shopped in the same aisle take a close look at their purchases to make sure the items are safe.

“I know that sometimes medicines change manufacturers and they may change shapes or forms, I’m not sure some people would think before they put it in their mouth before taking it, especially if they’re not feeling well,” Johnson said. 

The manager of the Mustang Wal-Mart told Johnson he would remove all bottles of the pills she bought from the shelves until the company determines what went wrong. 

A similar incident landed CVS in hot water after the drugstore gave several customers the wrong prescriptions between December 2011 and March 2012. It agreed to settle with the customers for $650,000 in 2013, reports NJ.com.