Dextromethorphan can be harmful in large amounts.

Dextromethorphan is found in many over-the-counter cough and cold medicines, including:

• Robitussin DM
• Triaminic DM
• Rondec DM
• Benylin DM
• Drixoral
• St. Joseph Cough Suppressant
• Coricidin
• Alka-Seltzer Plus Cold and Cough
• NyQuil
• DayQuil
• TheraFlu
• Tylenol Cold
• Dimetapp DM

This medicine is also abused and sold on the streets under the names:

• Robo
• Tussin
• Rojo
• Orange crush
• Triple Cs
• Red Devils
• Skittles
• Dex

Other products may also contain dextromethorphan.

Symptoms of a dextromethorphan overdose include:

• Breathing problems, including slow and labored breathing, shallow breathing, no breathing (especially in young children)
• Bluish-colored fingernails and lips
• Blurred vision
• Coma
• Constipation
• Seizures
• Drowsiness
• Dizziness
• Hallucinations
• Slow, unsteady walking
• High or low blood pressure
• Muscle twitches
• Nausea and vomiting
• Pounding heartbeat (palpitations), rapid heartbeat
• Raised body temperature
• Spasms of the stomach and intestines

These symptoms may occur more often or be more severe in people who also take certain other medicines which affect serotonin, a chemical in the brain.

This can be a serious overdose. Get medical help right away.

Have this information ready:

• Person's age, weight, and condition
• Name of product (ingredients and strength, if known)
• Time it was swallowed
• Amount swallowed
• If the medicine was prescribed for the person

Your local poison control center can be reached directly by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the United States. This national hotline will let you talk to experts in poisoning. 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.

Take the container with you to the hospital, if possible.

The health care provider will measure and monitor the person's vital signs, including temperature, pulse, breathing rate, and blood pressure.

Tests that may be done include:

• Blood and urine tests
• Electrocardiogram (ECG)

Treatment may include:

• Fluids through a vein (by IV)
• Medicine to reverse the effect of the narcotic in the medicine (changes in mental state and behavior) and treat other symptoms
• Activated charcoal
• Laxative
• Breathing support, including a tube through the mouth into the lungs and connected to a breathing machine (ventilator)

This medicine is safe if you take it as directed. However, many teenagers take very high amounts of this medicine to "feel good" and to have hallucinations. Like other medicines of abuse, this can be dangerous. Over-the-counter cough medicines that contain dextromethorphan often contain other medicines that can also be dangerous in an overdose.

Although most people who abuse dextromethorphan will need no treatment, some people will. Survival is based on how quickly a person receives help at a hospital.

DXM overdose; Robo overdose; Orange crush overdose; Red devils overdose; Triple C's overdose

Aronson JK. Dextromethorphan. In: Aronson JK, ed. Meyler's Side Effects of Drugs. 16th ed. Waltham, MA: Elsevier; 2016:899-905.

Barrett W, Iwanicki JL. THC and hallucinogens. In: Walls RM, ed. Rosen's Emergency Medicine: Concepts and Clinical Practice. 10th ed. Philadelphia, PA: Elsevier; 2023:chap 150.

Updated by: Jesse Borke, MD, CPE, FAAEM, FACEP, Attending Physician at Kaiser Permanente, Orange County, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.