Drug Overdose

Overview

A drug overdose happens when a person takes too much of a medicine or substance, whether it is prescribed, bought over-the-counter, or illegal. This can overwhelm the body and cause dangerous symptoms that need immediate medical help. An overdose can be accidental or intentional.

Drug overdose is a serious global health problem. Emergency departments around the world treat overdoses every day. In the UK alone, there are thousands of hospital admissions each year for medicine-related poisoning.

Overdose can happen at any age. Young children are at risk of accidental poisoning from exploring household medicines. Teens and adults may overdose through misuse of prescribed or recreational substances. Older adults can accidentally take too much because of confusion with multiple medicines. People with mental health conditions or substance use disorders are at higher risk of intentional overdose.

Symptoms

Common symptoms

• Drowsiness, confusion, or agitation
• Slow, shallow, or stopped breathing
• Blue or pale skin, especially lips or fingertips
• Nausea, vomiting, or stomach pain
• Seizures or muscle twitching
• Pinpoint or very large pupils
• Loss of consciousness or being unrousable

Symptoms in children

• Young children may suddenly become very sleepy, vomit, or have trouble breathing. They might cry or be irritable before becoming unresponsive. If you notice an open medicine bottle or missing pills, treat it as an emergency even without symptoms.

Symptoms in older adults

• Older people may show confusion, dizziness, or falls. They might have slurred speech or seem more forgetful than usual. Because these can mimic other age-related issues, a sudden change after taking medicines should raise concern.

Causes

Main causes

• Taking too much of a medicine by mistake, such as doubling doses or misunderstanding instructions.
• Mixing medications with alcohol or other drugs, which can multiply effects dangerously.
• Using illegal substances where the strength or contents are unknown.
• Intentionally harming oneself by taking a large amount of medicine or poison.

When to see a doctor

See a doctor urgently if:

• If you or someone else has taken an unsafe amount of any substance, even if they still feel fine, go to the emergency department immediately or call your local emergency number. Do not wait for symptoms to appear.
• If a child has possibly swallowed any adult medicine, vitamin, or recreational drug, treat it as an emergency right away.

Book a routine appointment if:

• To talk to your doctor about any worries you have about your medicines, including side effects or confusion about doses.
• If you are concerned about your alcohol or drug use, make an appointment with your GP or nurse for a confidential chat.

Diagnosis

Diagnosis begins with a careful look by paramedics or an emergency doctor. They will check the person's breathing, heart rate, temperature, and level of alertness. They may ask the person (if awake) or anyone with them what was taken, when, and how much. If the person cannot speak, the team looks for clues like empty medicine packets, a smell on the breath, or needle marks.

Tests that may be done

• Blood and urine tests to detect specific substances and check organ function.
• An electrocardiogram (ECG) to record the heart's electrical activity.
• Monitoring of oxygen levels using a small clip on the finger.
• Sometimes a CT scan of the head if there was a fall or injury.

What to expect at your appointment

At the hospital, the team will act quickly to help the person breathe and keep their heart stable. You may be asked many questions, and staff will treat you with respect and privacy. A mental health assessment may be offered if the overdose was intentional. It is normal to feel frightened or embarrassed, but the priority is your health and safety.

Treatment

Treatment is tailored to the substance taken and how severe the overdose is. In all cases, the main goals are to support breathing and circulation, prevent further harm, and provide emotional support.

Self-care at home

• After being treated, follow the doctor's discharge instructions carefully.
• Keep any follow-up appointments with your GP or specialist.
• If you struggle with substance use or mental distress, reach out to a support line or counselling service.
• Remove or lock away any remaining medicines or substances that could be misused.

Medical treatments

In hospital, treatment may include activated charcoal (a drink that soaks up some drugs in the stomach), fluids through a drip to support blood pressure, or breathing support with a mask or machine. Doctors closely monitor the heart, lungs, and brain. In some cases, they may use short-term antidotes to reverse the effects of certain drugs, but these are given only by specialists under strict safety rules.

When is surgery considered?

Surgery is not a treatment for overdose itself. In very rare cases, if a person has a serious injury from a fall during an overdose, an operation may be needed.

Living with this condition

After a drug overdose, life can feel overwhelming. You may need time to heal physically and emotionally. You might feel tired or confused for a few days. It is important to rest and accept help from trusted family or friends.

Lifestyle tips

• Avoid alcohol or any non-prescribed substances until your healthcare team says it is safe.
• Spend time in safe, calm environments.
• Stick to a regular sleep and meal schedule to help your body recover.
• If you are prescribed medicines long-term, use a daily pill organiser and set reminders to avoid confusion.

Diet and exercise

Nourishing food and gentle movement can support recovery. Drink plenty of water and eat simple, balanced meals. A short daily walk, as advised by your doctor, can lift your mood and rebuild strength.

Mental health and emotional wellbeing

An overdose can bring up many tough feelings — shame, guilt, sadness, or anxiety. If the overdose was intentional, it is a sign that you have been in intense emotional pain. You are not alone. Help is available. Speak with your doctor about counselling, support groups, or mental health services. If you ever have thoughts of harming yourself again, please reach out immediately (see the helplines below). Remember, your life matters and you deserve support and care.

Prevention

Many overdoses can be prevented. Storing medicines and household chemicals out of sight and reach of children is key. Always read medicine labels and follow the dose exactly. Never mix medicines with alcohol or recreational drugs unless a doctor says it is safe. If you are finding it hard to cope with life, speak to a healthcare professional early — they can connect you with the right support before a crisis happens.

Complications

If left untreated

• Brain damage from lack of oxygen if breathing stops for too long.
• Permanent damage to the liver, kidneys, or heart from toxic substances.
• Seizures that can cause injury or lead to even longer fits.
• Death.

Long-term outlook

With rapid emergency treatment, most people make a full physical recovery. However, the emotional journey may take longer. Please know that many people go on to live healthy, meaningful lives after an overdose. Support is available to help you or your loved one address the underlying causes and reduce the chance of it happening again. There is always hope.

Find support

International organisations

• Befrienders Worldwide ↗

Local organisations

• NHS 111 ↗ · United Kingdom

Helplines

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