Why was Kirkland Stool softener taken off the shelves?

There is no evidence that Kirkland Stool Softener, or any product by that name, has ever been taken off the shelves. It's likely you're thinking of a different product or brand.

Could you please provide more details, such as:

* The full name of the product: Is it Kirkland Signature Stool Softener? Is there a specific ingredient you're thinking of?

* Where you heard about it: Did you see a news article, a post online, or hear it from someone?

* When you heard about it: Was it recently, or a while ago?

With more information, I can help you find the answer you're looking for.