Vicodin was discontinued because its formulations contained too much acetaminophen. In 2014, the FDA formally withdrew approval of all three Vicodin products after determining that prescription painkillers with more than 325 milligrams of acetaminophen per tablet posed an unacceptable risk of liver damage. The original Vicodin contained 500 mg, Vicodin ES had 750 mg, and Vicodin HP packed 660 mg per tablet. None could meet the new safety threshold, so they were pulled from the market.
The Acetaminophen Problem
Acetaminophen is the active ingredient in Tylenol and one of the most common pain relievers in the world. It’s also one of the leading causes of acute liver failure in the United States. Roughly 30,000 people are hospitalized each year for acetaminophen-related liver injury, and about 300 of those cases are fatal.
The danger with combination painkillers like Vicodin was that patients often didn’t realize how much acetaminophen they were taking. A person prescribed Vicodin ES at its maximum dosing schedule could approach or exceed the safe daily limit of 4,000 milligrams of acetaminophen from that single medication alone. Add in an over-the-counter cold remedy or headache tablet that also contained acetaminophen, and the total could climb into toxic territory without any obvious warning. Early symptoms of acetaminophen toxicity, such as nausea and fatigue, are easy to dismiss or mistake for something else, and liver damage can progress silently for hours before becoming severe.
The FDA’s 2011 Mandate
On January 13, 2011, the FDA announced that all prescription combination opioid products would be limited to a maximum of 325 mg of acetaminophen per tablet. Manufacturers were given until March 27, 2014, to reformulate or stop selling products that exceeded that cap. The agency concluded that high-dose acetaminophen combinations simply did not “provide a sufficient margin of safety to protect the public against the serious risk of acetaminophen-induced liver injury.”
AbbVie, the maker of Vicodin, did not reformulate. In July 2014, the FDA published a Federal Register notice formally withdrawing approval of the abbreviated new drug applications for Vicodin (500 mg acetaminophen/5 mg hydrocodone), Vicodin ES (750 mg/7.5 mg), and Vicodin HP (660 mg/10 mg). Manufacturing or distributing these products after that point became illegal.
Hydrocodone’s Rescheduling Added Further Restrictions
Just weeks after the Vicodin withdrawal, a second regulatory change hit hydrocodone products. In August 2014, the DEA published a final rule moving all hydrocodone combination products from Schedule III to Schedule II, the most restrictive category for drugs with accepted medical use. The reclassification took effect 45 days later.
Under Schedule III, doctors could call in refills by phone, and patients could receive up to five refills on a single prescription. Under Schedule II, every prescription requires a new, written order. No refills are allowed. This made hydrocodone products significantly harder to prescribe casually and reduced the volume of pills circulating at any given time. The change reflected growing concern about the role hydrocodone played in the opioid crisis: at the time, hydrocodone combinations were among the most prescribed and most diverted medications in the country.
What Replaced Vicodin
The active ingredients in Vicodin, hydrocodone and acetaminophen, are still widely prescribed. What changed is the formulation. Generic versions containing 325 mg of acetaminophen paired with various hydrocodone strengths (5 mg, 7.5 mg, or 10 mg) remain available and are commonly dispensed. If you’ve seen the brand name Norco, that was one compliant formulation already on the market before the mandate, though it too has since been replaced mostly by generics.
The Vicodin brand name itself is no longer on the market. MedlinePlus lists it, along with Vicodin ES and Vicodin HP, as discontinued branded products. So if your doctor prescribes hydrocodone with acetaminophen today, the pharmacy will fill it as a generic tablet that meets the current 325 mg acetaminophen cap. The pain relief is functionally the same. The difference is a lower dose of acetaminophen in each pill, which reduces the chance of liver damage if you take multiple doses throughout the day or accidentally overlap with other acetaminophen-containing medications.
Why Acetaminophen Limits Still Matter
Even with the reformulated tablets, acetaminophen toxicity remains a real concern. The safe ceiling for most adults is 4,000 mg per day, but some manufacturers have voluntarily lowered their recommended maximums. Tylenol Extra Strength, for example, caps its label guidance at 3,000 mg per 24 hours.
Acetaminophen shows up in hundreds of products: cold and flu remedies, sleep aids, migraine formulas, and prescription painkillers. The risk isn’t usually a single large dose. It’s the slow accumulation from multiple sources over the course of a day. If you’re taking a hydrocodone-acetaminophen prescription, checking the labels on any other medications you use for hidden acetaminophen content is one of the simplest ways to protect your liver.