Poisoning – Causes, Symptoms, First Aid

Patient Tools

Read, save, and share this guide

Use these quick tools to make this medical article easier to read, print, save, or share with a family member.

On this page7 sections

Article Summary

Poisoning is caused by exposure to a harmful substance. This can be due to swallowing, injecting, breathing in, or other means. Most poisonings occur by accident. Immediate first aid is very important in a poisoning emergency. The first aid you give before getting medical help can save a person's life. This article is for information only. DO NOT use it to treat or manage an...

Key Takeaways

  • This article explains Considerations in simple medical language.
  • This article explains Causes in simple medical language.
  • This article explains Symptoms in simple medical language.
  • This article explains First Aid in simple medical language.
Before reading

RX Patient Tools

Use these quick guides before reading the article, or return to them when you need help preparing questions for a doctor.

Start here Choose the right pathway for symptoms, reports, medicines, or urgent warning signs. Disease article roadmap Read this topic step by step: meaning, symptoms, warning signs, diagnosis, treatment, prevention, and follow-up. Treatment planner Prepare questions about treatment choices, benefits, risks, side effects, and follow-up. Family & caregiver guide Organize symptoms, reports, medicines, questions, and follow-up safely. Nutrition & diet guide Prepare food, hydration, supplement, and medicine-timing questions safely. Prevention guide Organize risk factors, protective habits, screening, and warning signs. Recovery guide Prepare a safe plan for activity, rehabilitation, warning signs, and follow-up.
Educational health guideWritten for patient understanding and clinical awareness.
Reviewed content workflowUse writer and reviewer profiles for stronger trust.
Emergency safety firstUrgent warning signs are highlighted below.
Choose your reading view

Patient View highlights a simple learning journey. Clinical View reveals structure, evidence, and editorial completeness.

Definition

Poisoning is caused by exposure to a harmful substance. This can be due to swallowing, injecting, breathing in, or other means. Most poisonings occur by accident.

Immediate first aid is very important in a poisoning . The first aid you give before getting medical help can save a person’s life.

This article is for information only. DO NOT use it to treat or manage an actual poison exposure. If you or someone you are with has an exposure, call your local emergency number (such as 911), or your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States.

Considerations

Millions of poisonings are reported to United States poison control centers every year. Many result in death.

It is important to note that just because a package does not have a warning label does not mean a substance is safe. You should consider poisoning if someone suddenly becomes sick for no apparent reason. Poisoning should also be considered if the person is found near a furnace, car, fire, or in an area that is not well ventilated.

Symptoms of poisoning may take time to develop. However, if you think someone has been poisoned, DO NOT wait for symptoms to develop. Get medical help right away.

Causes

Items that can cause poisoning include:

  • Carbon monoxide gas (from furnaces, gas engines, fires, space heaters)
  • Certain foods
  • Chemicals in the workplace
  • Drugs, including over-the-counter and medicines (such as an aspirin overdose ) and illicit drugs such as cocaine
  • Household detergents and cleaning products
  • Household and outdoor plants (eating toxic plants)
  • Insecticides
  • Paints

Symptoms

Symptoms vary according to the poison, but may include:

  • Bluish lips
  • Difficulty breathing or
  • Drowsiness
  • Heart
  • Irritability
  • Loss of control
  • Muscle twitching
  • and
  • and
  • Seizures
  • Skin  or burns
  • Stupor
  • Unusual breath odor

First Aid

Seek immediate medical help.

For poisoning by swallowing:

Check and monitor the person’s airway, breathing, and pulse. If necessary, begin rescue breathing and CPR .

  1. Try to make sure that the person has indeed been poisoned. It may be hard to tell. Some signs include chemical-smelling breath, burns around the mouth, difficulty breathing, vomiting, or unusual odors on the person. If possible, identify the poison.
  2. DO NOT make a person throw up unless told to do so by poison control or a health care professional.
  3. If the person vomits, clear the person’s airway. Wrap a cloth around your fingers before cleaning out the mouth and . If the person has been sick from a plant part, save the vomit. It may help experts identify what medicine can be used to help reverse the poisoning.
  4. If the person starts having convulsions, give  first aid .
  5. Keep the person comfortable. The person should be rolled onto the left side, and remain there while getting or waiting for medical help.
  6. If the poison has spilled on the person’s clothes, remove the clothing and flush the skin with water.

For inhalation poisoning:

Call for emergency help. Never attempt to rescue a person without notifying others first.

  1. If it is safe to do so, rescue the person from the danger of the gas, fumes, or smoke. Open windows and doors to remove the fumes.
  2. Take several deep breaths of fresh air, and then hold your breath as you go in. Hold a wet cloth over your nose and mouth.
  3. DO NOT light a match or use a lighter because some gases can catch fire.
  4. After rescuing the person from danger, check and monitor the person’s airway, breathing, and pulse. If necessary, begin rescue breathing and CPR.
  5. If necessary, perform first aid for eye injuries or convulsion first aid.
  6. If the person vomits, clear the person’s airway. Wrap a cloth around your fingers before cleaning out the mouth and throat.
  7. Even if the person seems perfectly fine, get medical help.

Do Not

DO NOT:

  • Give an unconscious person anything by mouth.
  • Induce vomiting unless you are told to do so by the Poison Control Center or a doctor. A strong poison that burns on the way down the throat will also do damage on the way back up.
  • Try to neutralize the poison with lemon juice or vinegar, or any other substance, unless you are told to do so by the Poison Control Center or a doctor.
  • Use any “cure-all” type antidote.
  • Wait for symptoms to develop if you suspect that someone has been poisoned.

When to Contact a Medical Professional

Your local poison center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. They will give you further instructions.

This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does not need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.

After doing first aid steps at home, you may need to go to the emergency room. Take the container with you to the hospital, if possible. At the hospital you will have an exam. You also may need the following tests and treatments.

  • Activated charcoal
  • Airway support, including oxygen, breathing tube through the mouth (intubation),and ventilator (breathing machine)
  • Blood and urine tests
  • Chest
  • (computerized tomography, or advanced imaging) scan
  • EKG (electrocardiogram, or heart tracing)
  • Fluids through the (IV)
  • Laxative
  • Medicines to treat symptoms, including antidotes to reverse the effects of the poisoning if one exists

Prevention

Be aware of poisons in and around your home. Take steps to protect young children from toxic substances. Store all medicines , cleaners, cosmetics, and household chemicals out of reach of children, or in cabinets with childproof latches.

Be familiar with plants in your home, yard, and vicinity. Keep your children informed, too. Remove any poisonous plants. Never eat wild plants, mushrooms, roots, or berries unless you very familiar with them.

Teach children about the dangers of substances that contain poison. Label all poisons.

DO NOT store household chemicals in food containers, even if they are labeled. Most nonfood substances are poisonous if taken in large doses.

If you are concerned that industrial poisons might be polluting nearby land or water, report your concerns to the local health department or the state or federal Environmental Protection Agency.

 

Kulig K. General approach to the poisoned patient. In: Marx JA, Hockberger RS, Walls RM, et al., eds. Rosen’s Emergency Medicine: Concepts and Practice . 8th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 147.

Mowry JB, Spyker DA, Cantilena LR Jr, McMillan N, Ford M. 2013 Annual Report of the American Association of Poison Control Centers’ National Poison Data System (NPDS): 31st Annual Report. Clin Toxicol (Phila) . 2014 Dec;52(10):1032-283. PMID: 25559822 www.ncbi.nlm.nih.gov/pubmed/25559822 .

RX Clinical Pathway Engine

Continue through a complete learning pathway

Move from understanding the topic to symptoms, tests, treatment, medicines, monitoring, and prevention.

Search the complete library
  1. Understand the condition Begin with the essential facts and a clear explanation of the topic.
  2. Recognize symptoms Learn common symptoms, signs, and patterns of presentation.
  3. Know when to seek help Review urgent warning signs and when professional assessment may be needed.
  4. Understand causes and risks Explore causes, risk factors, mechanisms, and contributing conditions.
  5. Explore tests and diagnosis Learn how clinicians assess the condition and which investigations may be discussed.
  6. Learn treatment approaches Review general treatment categories and management principles.
  7. Understand medicines safely Continue to medicine education, uses, precautions, and monitoring.
  8. Plan monitoring and follow-up Understand monitoring, complications, rehabilitation, and follow-up learning.
  9. Review prevention and self-care Explore prevention, healthy routines, and questions to discuss with a clinician.

Conditions & Diseases

Background, symptoms, causes, diagnosis, and care.

Explore this library

Tests & Investigations

Laboratory, imaging, screening, and diagnostic education.

Explore this library

Medicines

Uses, safety, monitoring, and related medicine knowledge.

Explore this library

Cancer Knowledge

Cancer types, screening, oncology, and treatment education.

Explore this library
Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Drink safe fluids and monitor temperature.
  • In dengue-prone areas, discuss CBC and platelet count when fever persists or warning signs appear.
  • Use tepid sponging for high fever discomfort; avoid ice-cold bathing.

OTC medicine safety

  • For fever, common fever medicine may be discussed with a clinician or pharmacist.
  • Avoid aspirin/ibuprofen-like medicines in suspected dengue unless a doctor says it is safe.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Fever with breathing difficulty, confusion, repeated vomiting, bleeding, severe weakness, stiff neck, or dehydration needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Medicine doctor / pediatrician for children / qualified clinician
Tests to discuss with doctor
  • Temperature chart and hydration assessment
  • CBC with platelet count if fever persists or dengue/other infection is possible
  • Urine test, malaria/dengue tests, chest evaluation, or blood culture only when clinically indicated
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?
  • Do I need antibiotics, or is this more likely viral?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Poisoning – Causes, Symptoms, First Aid

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.