Hydrocodone Overdose: Signs, Naloxone and What to Do

A hydrocodone overdose happens when opioid effects become strong enough to dangerously suppress breathing and consciousness. The most important warning signs are inability to wake the person, very slow or shallow breathing, choking or gurgling sounds in someone who cannot be awakened, discolored lips or nails, and very small pupils. If an opioid overdose is possible, give naloxone if it is available and call emergency services immediately.

Hydrocodone overdose risk rises when the drug is combined with alcohol, Xanax or another benzodiazepine, other opioids, sedative sleep medicines, or other central nervous system depressants. Risk can also increase after a period without opioids because tolerance falls. Counterfeit pills add another danger because a tablet sold as hydrocodone may contain fentanyl or another unexpected opioid.

Many hydrocodone tablets also contain acetaminophen. In those products, taking too many tablets can create two separate emergencies at once: opioid poisoning from hydrocodone and potentially severe liver injury from acetaminophen.

Hydrocodone Overdose at a Glance

What Happens During a Hydrocodone Overdose?

Hydrocodone is a full opioid agonist. Opioids reduce pain by acting on opioid receptors, but they also act on areas of the brainstem that regulate breathing. With excessive opioid effect, the brain’s drive to breathe weakens.

Breaths can become slow, shallow, irregular, or stop. As oxygen levels fall, the brain and other organs can be injured. Without intervention, severe respiratory depression can lead to coma, permanent brain injury, or death.

Signs of Hydrocodone Overdose

CDC advises recognizing several characteristic opioid-overdose signs:

• Unconsciousness or inability to wake the person
• Very slow or shallow breathing
• Long pauses between breaths
• Choking, gurgling, or unusual snoring sounds in a person who cannot be awakened
• Blue, gray, pale, or otherwise markedly discolored lips, fingernails, or skin
• Small, constricted “pinpoint” pupils

Not every person will show every sign. If it is difficult to tell whether someone is heavily sedated or overdosing, CDC advises treating the situation like an overdose because waiting can cost critical time.

What to Do for a Suspected Hydrocodone Overdose

1. Give naloxone if it is available.
2. Call emergency services immediately.
3. Follow the emergency dispatcher’s instructions.
4. Try to keep the person breathing and responsive if possible.
5. Place the person on their side when appropriate to reduce choking risk.
6. Stay with the person until emergency help arrives.

Naloxone can temporarily reverse opioid effects. Its effect can wear off while hydrocodone or another opioid is still active, so a response to naloxone does not eliminate the need for emergency medical care.

Can Naloxone Reverse Hydrocodone?

Yes. Naloxone is an opioid antagonist and can reverse life-threatening opioid effects, including respiratory depression from hydrocodone. Current opioid labeling and CDC guidance encourage naloxone access for people at increased overdose risk and for household members who may need to respond.

More than one naloxone dose may sometimes be needed. This is particularly relevant when the actual opioid exposure is unknown or when a counterfeit pill may contain a potent synthetic opioid.

What Increases Hydrocodone Overdose Risk?

• Taking more hydrocodone than prescribed
• Taking another person’s opioid prescription
• Combining hydrocodone with alcohol
• Combining hydrocodone with Xanax or another benzodiazepine
• Using other opioids at the same time
• Using sedative-hypnotics, muscle relaxants, or other CNS depressants
• Using pills obtained from dealers, social media, or unsafe online sources
• Returning to opioid use after tolerance has decreased
• Significant respiratory disease
• Older age or frailty
• Changes in medications that raise hydrocodone concentrations

Hydrocodone and Alcohol Overdose Risk

Alcohol and hydrocodone both depress the central nervous system. Current DailyMed labeling warns that their combined effects can cause profound sedation, respiratory depression, coma, and death.

The safest message is not to try to calculate a personal “safe amount” of alcohol around hydrocodone. A person taking hydrocodone should follow the prescribing clinician’s instructions and current medication guidance.

See Hydrocodone and Alcohol for the full interaction guide.

Hydrocodone and Xanax Overdose Risk

Alprazolam, sold under the brand name Xanax and as generics, is a benzodiazepine. Benzodiazepines and opioids both reduce central nervous system activity. FDA and current hydrocodone labeling warn that their combined use can cause severe respiratory depression and death.

People who have legitimate prescriptions for both medications should not independently stop or change either drug. In particular, abrupt benzodiazepine discontinuation can cause serious withdrawal, including seizures. Prescribers should coordinate the treatment plan.

See Hydrocodone and Xanax for the dedicated interaction resource.

Hydrocodone Overdose After Detox or Abstinence

Opioid tolerance can fall after detox, hospitalization, incarceration, residential treatment, or another period without regular opioid exposure. Returning to an amount previously used can then produce much stronger respiratory depression.

This is one reason overdose-prevention planning and naloxone are important after periods of abstinence. The risk is not evidence that treatment “caused” overdose; it reflects the physiologic loss of opioid tolerance.

Can One Hydrocodone Pill Cause an Overdose?

There is no universal number of tablets that is safe for every person. Current labeling warns that accidental ingestion of even one opioid dose can be fatal, particularly in children. A person without opioid tolerance can also be more sensitive than someone receiving long-term opioid therapy.

A pill from an unknown source adds another problem: the tablet may not contain the labeled amount or even the expected drug.

Counterfeit Hydrocodone Pills and Fentanyl

Counterfeit prescription pills can copy legitimate tablet imprints. A tablet sold as hydrocodone may contain fentanyl or another unexpected substance. This can make the overdose risk much greater and much less predictable.

Pages such as M365 White Pill, M367 Pill, and IP 110 Pill identify legitimate pharmaceutical products. They cannot authenticate a loose street pill.

Hydrocodone/Acetaminophen Overdose

Many common hydrocodone tablets contain 325 mg of acetaminophen. Taking excessive quantities can therefore expose the person to both opioid toxicity and acetaminophen poisoning.

Acetaminophen-related liver injury can develop even when early symptoms are mild or absent. Someone who may have taken a dangerous total amount needs medical evaluation even if they are currently awake and breathing normally.

Is Hydrocodone Overdose the Same as Being Very High?

No. Euphoria or sedation can occur before an overdose, but overdose is a medical emergency involving dangerous opioid toxicity. The practical dividing line is not how “high” someone appears; it is whether consciousness and breathing are impaired.

If a person cannot be awakened normally or breathing is slow or abnormal, treat the situation as an overdose.

Hydrocodone Overdose vs. Withdrawal

See Hydrocodone Withdrawal for the separate withdrawal guide.

Who Should Have Naloxone Available?

Current opioid guidance encourages clinicians to discuss naloxone when overdose risk is elevated. This can include people taking opioids with other CNS depressants, people with a history of overdose or substance use disorder, people receiving higher-risk opioid regimens, and households where accidental exposure is possible.

Family members and close contacts should know where naloxone is kept and how to use the formulation available to them.

What Happens After a Nonfatal Hydrocodone Overdose?

A nonfatal overdose is an important opportunity for reassessment. Follow-up may include reviewing the opioid prescription, checking for benzodiazepines or alcohol use, evaluating counterfeit-pill exposure, providing naloxone, assessing for opioid use disorder, and discussing evidence-based treatment.

Someone with opioid use disorder may benefit from medications such as buprenorphine, methadone, or naltrexone along with ongoing medical and behavioral care.

When to Seek Treatment for Hydrocodone Use

Someone does not need to wait for an overdose. Repeatedly taking more hydrocodone than intended, experiencing withdrawal, using pills from nonmedical sources, mixing opioids with sedatives, or struggling to control use are reasons for assessment.

Rehabs.Today provides resources for detox centers, residential treatment programs, and dual-diagnosis treatment.

Why Mixed-Drug Overdoses Can Be Harder to Recognize

Hydrocodone is often not the only substance involved in a serious overdose. Alcohol, alprazolam, other benzodiazepines, sleep medicines, gabapentinoids, muscle relaxants, and other opioids can all add sedation. A person may therefore have both opioid toxicity and non-opioid intoxication at the same time.

Naloxone can reverse the opioid component, but it will not reverse alcohol or benzodiazepines. A person who begins breathing better after naloxone may remain dangerously sedated from another drug. This is why emergency evaluation is still necessary after an apparent response.

Hydrocodone Overdose Risk in Children and Other Opioid-Naive People

Current opioid labeling warns that accidental ingestion of even one dose can be fatal, especially in children. Children, opioid-naive adults, and people who have lost tolerance do not have the physiologic adaptation of a patient receiving regular opioid therapy.

Hydrocodone should therefore be stored securely rather than left in a purse, bedside drawer, bathroom cabinet, or other location accessible to children or visitors.

Hydrocodone Overdose in Older Adults or People With Breathing Problems

Older or frail adults and people with impaired respiratory function can have a narrower margin between therapeutic sedation and dangerous respiratory depression. COPD, sleep-related breathing disorders, significant illness, and multiple sedating prescriptions can increase concern.

New confusion, unusual sleepiness, falls, or difficulty waking should be taken seriously rather than assumed to be normal aging or expected pain-medication effects.

Why Acetaminophen Poisoning May Not Look Like an Opioid Overdose

Hydrocodone/acetaminophen products can produce two different toxicity patterns. Opioid overdose usually announces itself through sedation and abnormal breathing. Acetaminophen toxicity can initially cause nausea, vomiting, abdominal discomfort, or no obvious symptoms at all while liver injury is developing.

A person who may have taken an excessive number of combination tablets needs medical evaluation for both ingredients. Being awake and breathing normally does not rule out dangerous acetaminophen exposure.

Overdose Prevention After Treatment or Hospitalization

Any period of reduced opioid exposure can lower tolerance. This can happen during detox, residential treatment, hospitalization, incarceration, or a self-directed period of abstinence. Overdose-prevention planning should therefore include discussion of reduced tolerance before the person leaves a controlled setting.

Keeping naloxone available, avoiding unknown pills, not mixing depressants, and engaging in ongoing treatment for opioid use disorder can reduce the risk of a fatal return to use.

Frequently Asked Questions About Hydrocodone Overdose

What are the signs of a hydrocodone overdose?

Inability to wake, slow or shallow breathing, gurgling or choking sounds, discolored lips or nails, and pinpoint pupils are important opioid-overdose signs.

Does naloxone work on hydrocodone?

Yes. Naloxone can temporarily reverse hydrocodone and other opioid effects.

Should you call 911 after naloxone works?

Yes. Naloxone can wear off while the opioid remains active, so emergency medical evaluation is still necessary.

Can hydrocodone and alcohol cause an overdose?

Yes. Combining alcohol and hydrocodone can increase sedation and respiratory depression and can lead to coma or death.

Can Xanax and hydrocodone cause an overdose?

Yes. FDA and hydrocodone labeling warn that opioids combined with benzodiazepines can cause severe respiratory depression and death.

Why is overdose risk higher after detox?

Opioid tolerance can decrease during abstinence, making a previously used amount more dangerous if opioid use resumes.

Sources

• DailyMed: Hydrocodone Bitartrate and Acetaminophen Tablets, revised January 2026 — current boxed warnings, respiratory-depression risk, CNS-depressant interactions, pharmacokinetics and opioid safety information.
• MedlinePlus: Hydrocodone — current patient information on alcohol, breathing risk, overdose, storage and withdrawal.
• CDC: Risks and How to Reduce Them — current opioid-overdose warning signs, naloxone and emergency response.
• FDA: Updated Opioid Pain Medicine Safety Guidance — overdose risk, naloxone, benzodiazepines, alcohol and safe opioid use.
• SAMHSA: Substance Use Treatment Options — evidence-based treatment for opioid use disorder.