Drug Overdose: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Drug Overdose?
The emergency itself is treated by emergency doctors and paramedics. After that, care often continues with a psychiatrist or a primary care doctor, who can adjust medicines safely and start treatment for substance use disorder. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is a drug overdose?
A drug overdose happens when a person takes too much of a medicine or drug, and the amount harms the body. This can happen with prescription medicines, over-the-counter products, or illegal drugs. An overdose is a medical emergency, and calling 911 right away can save a life.
A drug overdose means the body has more of a drug in it than it can handle. When the amount goes above a medicine's safe range, the drug starts to damage organs or shut down body functions. Overdoses can be intentional or accidental.
Symptoms
Symptoms depend on the drug, but common signs include trouble breathing, slow or irregular heartbeat, confusion, extreme sleepiness, or passing out. The skin may turn pale, bluish, or cold and clammy. Seizures, vomiting, and small or pinpoint pupils can also happen.
Causes and who gets it
An overdose can be caused by taking too much of one drug, mixing drugs, or combining drugs with alcohol. It can also happen when street drugs are laced with fentanyl. Anyone can have an overdose, but people who misuse drugs face higher risk.
How doctors diagnose it
Doctors diagnose an overdose based on what happened, the person's symptoms, and a physical exam. Blood and urine tests can show which drugs are in the body.
Treatment
Treatment starts with supporting breathing, heart rate, and other vital functions. For opioid overdoses, naloxone can quickly reverse the effects. Afterward, care may include hospital monitoring and treatment for substance use disorder.
When to see a doctor
Call 911 right away if someone has trouble breathing, will not wake up, has seizures, or has blue or pale skin after taking a drug. Even if the person seems okay, a doctor should check them, because some overdoses get worse hours later.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either one can manage follow-up care after an overdose, prescribe medicines for opioid or alcohol use disorder, and treat mental health concerns.
Common questions
Can I give someone naloxone if I am not a doctor?
Yes. Naloxone is safe for anyone to give, and it is available in many pharmacies without a prescription. It will not harm a person who has not taken opioids. Always call 911 as well, because naloxone can wear off before the opioid does.
Will someone get in trouble for calling 911 during an overdose?
Most states have Good Samaritan laws, which protect people who call for help during an overdose from certain criminal charges. These laws exist so that fear of legal trouble does not stop people from saving lives.
Can an overdose happen with regular prescription medicines?
Yes. Taking too much of a prescribed medicine, or combining it with alcohol or another drug, can cause an overdose. This is why it helps to keep a list of all your medicines and share it with your doctor and pharmacist.
Is an overdose always intentional?
No. Many overdoses are accidental, caused by a dosing mistake, a drug interaction, or a stronger drug than expected.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
