What Is a Drug Overdose? Signs, Causes, Risks, and What to Do

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A drug overdose happens when a person takes more of a substance than the body can safely process, causing dangerous effects on the brain, heart, breathing, or other vital systems. An overdose can happen with prescription medications, illicit drugs, or combinations of substances. It may be accidental or intentional, and in severe cases, it can result in permanent injury or death.

Understanding what a drug overdose is, recognizing the warning signs, and knowing how to respond can save a life. If you believe someone is overdosing, treat it as a medical emergency and call 911 immediately.

At Florida Atlantic Coast Treatment Solution, we provide evidence-based addiction and mental health treatment designed to help individuals move beyond substance use and work toward lasting recovery.

What Is a Drug Overdose?

A drug overdose occurs when the amount or combination of drugs in the body overwhelms its ability to function safely. Different substances affect the body in different ways, so an overdose may cause slowed breathing, abnormal heart rhythms, seizures, unconsciousness, extreme agitation, or other serious symptoms.

An overdose does not always happen because someone deliberately takes a large amount of a drug. It can occur when a person takes medication incorrectly, combines substances, unknowingly uses a more potent drug, or loses tolerance after a period of abstinence.

Because illicit drugs can have unpredictable potency or contain undisclosed substances, it can be difficult to know exactly how much of a drug someone has consumed.

What Causes a Drug Overdose?

Several factors can contribute to overdose risk. These include:

• Taking more medication than prescribed

• Using illicit drugs with unknown potency

• Combining multiple drugs

• Mixing drugs with alcohol

• Using opioids with other sedating substances

• Returning to drug use after a period of abstinence

• Having reduced drug tolerance

• Taking someone else's prescription medication

• Accidentally taking the wrong medication or dose

• Having certain medical conditions

Combining substances can be particularly dangerous. For example, the CDC warns that combining opioids with alcohol or other drugs that cause drowsiness can increase the risk of serious harm. (CDC)

What Happens During a Drug Overdose?

The effects of an overdose depend on the substance involved.

Opioids, including fentanyl, heroin, and certain prescription pain medications, can suppress the body's ability to breathe. During a severe opioid overdose, breathing may become extremely slow or stop, potentially causing brain damage or death. (CDC)

Stimulants, such as cocaine and methamphetamine, can produce a different set of dangers. Excessive stimulant exposure may contribute to dangerously high body temperature, seizures, abnormal heart rhythms, or cardiovascular complications.

Other substances can cause severe sedation, confusion, vomiting, seizures, or loss of consciousness.

Because overdose symptoms vary, any unexplained loss of consciousness or severe change in behavior after drug use should be treated seriously.

Common Signs of a Drug Overdose

Recognizing the warning signs of an overdose is critical.

Possible symptoms include:

• Unconsciousness

• Inability to wake the person

• Slow, shallow, or stopped breathing

• Choking or gurgling sounds

• Blue, gray, or pale lips or skin

• Very small or "pinpoint" pupils

• Seizures

• Severe confusion

• Extreme agitation

• Vomiting

• Limpness

• Abnormal heart rate

The CDC specifically identifies inability to awaken, slow or shallow breathing, choking or gurgling sounds, discolored skin, and pinpoint pupils as important signs of opioid overdose. (CDC)

If you are unsure whether someone is experiencing an overdose or is simply intoxicated, it is safer to treat the situation as an overdose.

What Should You Do If Someone Is Overdosing?

A suspected overdose requires immediate action.

1. Call 911

Contact emergency medical services immediately. Do not wait to see whether the person gets better.

2. Give Naloxone If an Opioid Overdose Is Possible

If naloxone is available and an opioid overdose is suspected, administer it according to the product instructions. Naloxone can reverse opioid overdose and restore breathing when given in time. (CDC)

3. Help Keep the Person Breathing

Follow the emergency dispatcher's instructions and provide appropriate assistance while waiting for medical professionals.

4. Place the Person on Their Side

If the person is unconscious but breathing, placing them on their side can help reduce the risk of choking.

5. Stay With Them

Do not leave the person alone. Continue monitoring them until emergency professionals arrive. These steps are consistent with CDC overdose-response guidance. (CDC)

How Does Naloxone Help During an Opioid Overdose?

Naloxone is an opioid overdose reversal medication. It works by blocking the effects of opioids and can restore normal breathing in someone experiencing an opioid overdose.

According to the CDC, naloxone can restore breathing within approximately two to three minutes when an opioid has slowed or stopped a person's breathing. More than one dose may be needed in some situations, particularly when potent opioids such as fentanyl are involved. (CDC)

Naloxone is not a substitute for emergency medical care. Even when a person responds to naloxone, emergency assistance should still be obtained.

Can a Drug Overdose Be Accidental?

Yes. Drug overdoses can happen unintentionally.

For example, someone may accidentally take too much prescription medication, misunderstand dosing instructions, or combine medications that interact dangerously.

People who use illicit substances may also face unpredictable potency. A person may believe they are taking a familiar amount but receive a substance that is substantially stronger than expected.

Another important risk occurs when someone returns to drug use after stopping for a period of time. Reduced tolerance can make a previously tolerated amount much more dangerous.

Can Someone Survive a Drug Overdose?

Yes, an overdose can be survivable, especially when emergency treatment is provided quickly. The outcome depends on the substance, amount involved, individual health, and how quickly treatment begins.

For opioid overdoses, rapid administration of naloxone can restore breathing and potentially prevent death. However, emergency medical evaluation remains important because the effects of some substances can continue or return after initial improvement. (CDC)

The most important response is to act quickly rather than trying to determine the exact severity of the overdose yourself.

Preventing Future Overdose

Preventing another overdose often involves addressing the underlying substance use problem.

Helpful steps may include:

• Seeking professional addiction treatment

• Discussing medication options with a healthcare provider

• Keeping naloxone available when appropriate

• Avoiding dangerous combinations of substances

• Following prescription instructions

• Learning about personal overdose risk

• Participating in therapy

• Developing a relapse prevention plan

• Building a reliable recovery support system

The CDC emphasizes expanding access to substance use disorder treatment, including medications for opioid use disorder, as an important part of overdose prevention. (CDC)

When Should You Seek Addiction Treatment?

A person does not have to experience an overdose before seeking help.

Professional treatment may be appropriate if you or someone you love:

• Cannot control drug use

• Has developed strong cravings

• Continues using despite negative consequences

• Has tried to stop but returned to use

• Uses drugs to cope with stress or emotional pain

• Has experienced an overdose

• Uses multiple substances

• Is worried about losing control of substance use

Early intervention can provide an opportunity to address substance use before a potentially life-threatening event occurs.

How Florida Atlantic Coast Treatment Solution Can Help

Florida Atlantic Coast Treatment Solution (FACTS Recovery) provides evidence-based treatment for substance use and mental health concerns. The organization offers medical detox, residential substance use treatment, and other levels of care designed around individual recovery needs. (factsrecovery.com)

Its treatment services include support for opioid, fentanyl, cocaine, crack cocaine, methamphetamine, alcohol, and other substance use disorders. (factsrecovery.com)

If substance use has become difficult to manage, professional support can help you understand your treatment options and determine an appropriate next step.

Call Florida Atlantic Coast Treatment Solution at (844) 643-2287 to learn more about addiction treatment and recovery support.

Final Thoughts

Knowing what a drug overdose is can help you recognize an emergency and respond quickly. An overdose occurs when a substance overwhelms the body's ability to function safely, and the effects can range from severe confusion and seizures to respiratory failure and unconsciousness.

If an overdose is suspected, call 911 immediately. If an opioid overdose is possible and naloxone is available, administer it while waiting for emergency assistance. (CDC)

An overdose can also be a warning that additional support is needed. With appropriate addiction treatment, therapy, medical care, and recovery support, people can work toward reducing substance-related risks and building healthier lives.

Florida Atlantic Coast Treatment Solution is available at (844) 643-2287 to help you explore your recovery options.