Why Trust Recovery Guide Hydrocodone is a prescription opioid found in common painkillers like Vicodin, Norco, and Lortab, used to treat moderate to severe pain. While effective when taken as directed, it carries a high potential for misuse and fatal overdose, and there is no universally agreed-upon lethal dose because the amount that can kill someone varies widely from person to person.
Research on fatal hydrocodone overdoses found average blood concentrations of around 0.47 milligrams per liter in lethal cases, but that number shifts significantly based on factors like body weight, opioid tolerance, overall health, and whether other substances are involved. Some people have died at much lower concentrations while others with high tolerance have survived more. The unpredictability of overdose risk is exactly why taking hydrocodone outside of a doctor’s instructions is so dangerous.
Learn more about the lethal doses of commonly abused drugs
Hydrocodone Drug Misuse Can Lead To Fatal Or Non-Fatal Overdose
Hydrocodone is a prescription opioid painkiller available as an extended-release capsule or tablet to be taken orally.
Unfortunately, medical professionals often prescribe Vicodin, a combination of hydrocodone and acetaminophen. Like other opioids, this drug is often misused for its euphoric, pain-relieving, and calming/sedation effects. Hydrocodone is a long-acting medication, meaning it works in phases to release into the bloodstream gradually after initially taking the medication. People may abuse the prescription drug by crushing and snorting it to force faster onset of effects, which can risk overdose, especially when combining it with other drugs or alcohol.
Taking one or more central nervous system depressants, like Vicodin and alcohol, risks respiratory depression. When left untreated, this can be fatal.
Factors That Make Hydrocodone Overdose More Likely
Because there is no predictable lethal dose for hydrocodone, understanding what increases the risk of overdose is more useful than any single number.
Factors that increase the likelihood of a fatal or near-fatal hydrocodone overdose include:
- Combining With Other Depressants: Mixing hydrocodone with alcohol, benzodiazepines, or other opioids multiplies the depressant effect on the central nervous system, making respiratory depression far more likely even at doses that would otherwise be non-lethal.
- Loss of Tolerance: People who stop using hydrocodone for a period of time, whether after completing detox, serving a jail sentence, or simply taking a break, lose their tolerance quickly. Returning to a previously normal dose can overwhelm the body and cause overdose.
- Crushing or Snorting Extended-Release Formulations: Extended-release hydrocodone will deliver the drug gradually over many hours. Crushing and snorting it releases the entire dose at once, increasing the risk of overdose.
- Acetaminophen Toxicity: Many hydrocodone products contain acetaminophen, and taking large amounts can cause severe liver damage even when the opioid dose alone might not be fatal.
- Underlying Health Conditions: Liver or kidney impairment slows how the body processes hydrocodone, causing it to build up to dangerous levels.
Several factors can push a person’s risk much higher, and fatal overdoses often involve more than one of them at the same time.
Warning Signs Of Hydrocodone Overdose
Respiratory depression is the primary risk of hydrocodone overdose, which is characterized by slow and labored breathing. This can turn to respiratory arrest, in which breathing ceases altogether. This is potentially fatal, but those under respiratory arrest can be saved if caught early enough.
Other important warning signs of hydrocodone overdose include:
- solemn behavior
- coma
- seizure
- cold and clammy skin
- muscle weakness
- drowsiness
- narrow or wide pupils
- slow heartbeat
What To Do If Someone Overdoses On Hydrocodone
If you suspect someone is overdosing on hydrocodone, call 911 immediately. While waiting for emergency services to arrive, administer naloxone (Narcan) if you have it available. Naloxone is a life-saving medication that reverses opioid overdoses by blocking the effects of opioids on the brain and restoring normal breathing. It comes as a nasal spray or injection and can be used by anyone, even without medical training.
After giving naloxone, stay with the person, keep them on their side if they’re unconscious, and monitor their breathing until paramedics arrive. Even if naloxone helps and the person wakes up, they still need emergency medical care because the effects of naloxone wear off and overdose symptoms can return.
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- U.S. Food and Drug Administration — Hydrocodone Bitartrate and Acetaminophen
https://www.accessdata.fda.gov/drugsatfda_docs/label/2014/040099Orig1s018lbl.pdf - National Center for Biotechnology Information: PubMed — What is the lethal concentration of hydrocodone?
https://pubmed.ncbi.nlm.nih.gov/20407360/ - U.S. National Library of Medicine: MedlinePlus — Hydrocodone
https://medlineplus.gov/druginfo/meds/a614045.html