Ex-Lax chocolate pieces haven’t actually been discontinued entirely, but the product you might remember is gone. The original Ex-Lax chocolate laxative used an ingredient called phenolphthalein, which the FDA banned from over-the-counter laxatives in 1999 after determining it posed a cancer risk. The formula was overhauled, and the version sold today uses a different active ingredient. If the current product tastes or works differently than what you remember, that’s why.
Why the Original Formula Was Pulled
Phenolphthalein was one of the most widely used stimulant laxative ingredients for decades. But animal studies found it caused tumors at multiple tissue sites across multiple species. The FDA’s Carcinogenicity Assessment Committee found clear, dose-dependent increases in a type of cancer called thymic lymphoma in mice, along with evidence that the compound damaged chromosomes and caused mutations in mammalian cells. The mechanism appeared to involve direct interference with a key tumor-suppressing gene (p53), which is one of the body’s primary defenses against cancer.
On January 29, 1999, the FDA issued a final rule declaring phenolphthalein “not generally recognized as safe and effective” for use in OTC laxatives. The agency’s conclusion was blunt: phenolphthalein was not safe enough, and its medical value as a laxative didn’t justify the potential cancer risk when safer alternatives existed. Every product containing it, including Ex-Lax’s original chocolate squares, had to be reformulated or pulled from shelves.
The Chocolate Format’s Other Problem
Beyond the ingredient ban, chocolate-flavored laxatives have always carried a specific safety concern: children eat them thinking they’re candy. The National Capital Poison Center has documented cases of young kids finding chocolate laxative tablets and consuming handfuls. In one case, a 3-year-old boy swallowed at least 20 tablets. In another, a 4-year-old girl ate five and developed abdominal pain and diarrhea within six hours.
For adults, a few extra laxative tablets cause discomfort. For small children, the resulting diarrhea can lead to dangerous fluid loss and dehydration. This risk hasn’t gone away with the new formula, and it likely factored into reduced enthusiasm for marketing laxatives in a format designed to look and taste like a treat.
What Ex-Lax Sells Now
Ex-Lax still exists, and a chocolate version is technically still available. The current product line includes Regular Strength Chocolated Pieces (sold in 12, 24, and 48 count packages) and Maximum Strength Tablets. Both now use sennosides, a plant-derived stimulant laxative, instead of phenolphthalein. Sennosides come from the senna plant and work by irritating the lining of the large intestine to trigger contractions.
If you’ve been searching store shelves and coming up empty, availability varies by retailer. Some pharmacies and grocery chains have reduced shelf space for chocolate laxatives in favor of pills, gummies, and powder formats that are harder for children to confuse with snacks. The product isn’t officially discontinued by its manufacturer, Haleon, but it may simply not be stocked at your local store.
Why It Doesn’t Taste the Same
If you’ve tried the current version and found it disappointing compared to the original, the reformulation is the reason. Phenolphthalein was nearly tasteless, which made it easy to mask inside a chocolate square that tasted like actual candy. Sennosides have a bitter, herbal flavor that’s harder to hide. The chocolate coating does its best, but the result is noticeably different from what longtime users remember. This taste difference, combined with thinner retail distribution, is why many people assume the product has been discontinued altogether.
For those looking for alternatives, senna-based laxatives are available in pill and tea form from several brands, and osmotic laxatives like polyethylene glycol (sold as MiraLAX and generics) work through a completely different, non-stimulant mechanism. Stimulant laxatives like sennosides are intended for occasional use, not daily reliance, because the gut can become dependent on them over time.