Pumping the stomach is a medical procedure that empties the contents of your stomach through a tube. Its formal name is gastric lavage, and it involves inserting a large tube through the mouth or nose, down the throat, and into the stomach. Fluid is then pushed in and drained out repeatedly to wash out whatever is inside.
Why It’s Done
The most well-known reason for stomach pumping is poisoning or drug overdose. If someone has swallowed a potentially life-threatening amount of a toxic substance, doctors may use gastric lavage to physically remove as much of it as possible before the body absorbs it. It can also be used to relieve a bowel obstruction or to empty the stomach before certain surgeries, where having food or liquid inside could be dangerous under anesthesia.
That said, stomach pumping is far less common today than most people assume. Major toxicology organizations, including the American Academy of Clinical Toxicology and the European Association of Poisons Centres, state that gastric lavage should not be performed routinely for poisoned patients. It’s now reserved for rare, life-threatening situations where the ingestion happened very recently.
The 60-Minute Window
Timing is everything with this procedure. Current guidelines say stomach pumping should only be considered if it can be performed within 60 minutes of the person swallowing the toxic substance. After that, too much of the substance has already moved out of the stomach and into the intestines, where the tube can’t reach it. Even within that one-hour window, studies have struggled to show that the procedure significantly improves outcomes compared to other treatments.
What Happens During the Procedure
The patient is positioned lying on their left side with their head tilted slightly downward. This positioning uses gravity to keep stomach contents from moving further into the intestines and reduces the risk of fluid accidentally entering the lungs.
A large, flexible rubber tube (much wider than a standard feeding tube) is measured against the outside of the body to estimate how far it needs to reach. The tube is lubricated and guided through the mouth or nose, down the esophagus, and into the stomach. Once in place, doctors confirm its position by listening with a stethoscope while pushing a small burst of air through the tube.
The washing process starts by draining whatever is already in the stomach. Then small amounts of water, roughly 200 milliliters (about seven ounces) at a time for adults, are pushed through the tube and drained back out. This cycle repeats many times. For adults, the total amount of water used can reach three liters or more, continuing until the fluid coming back out runs clear. In many poisoning cases, activated charcoal is then delivered through the same tube before it’s removed. The charcoal binds to any remaining toxins still in the stomach.
Risks and Complications
Stomach pumping is not a gentle procedure, which is a major reason it’s fallen out of routine use. The most serious risk is aspiration, where stomach contents or the washing fluid get pulled into the lungs. This can cause aspiration pneumonia, a potentially severe lung infection. The risk is especially high if the person is drowsy, unconscious, or has a weak gag reflex, which is common in overdose situations.
The tube itself can also cause physical injury. Possible complications include tears or perforation of the esophagus or stomach lining, particularly in patients who have had recent surgery or existing damage to the digestive tract. Bleeding is another concern. For these reasons, the procedure should only be performed by trained medical professionals in a hospital setting.
Certain substances make stomach pumping outright dangerous. If someone has swallowed a corrosive chemical like bleach or drain cleaner, pulling it back up through the esophagus causes a second round of burning damage. Hydrocarbons, such as gasoline or lighter fluid, pose a high risk of being inhaled into the lungs during the procedure. In both cases, stomach pumping is not used.
Why Activated Charcoal Is Often Preferred
For most poisoning cases today, activated charcoal has largely replaced stomach pumping as the first-line treatment. Activated charcoal works by binding to toxins in the stomach and intestines, preventing them from being absorbed into the bloodstream. It’s given as a thick, black liquid that the patient drinks or receives through a smaller tube.
The advantages are straightforward: activated charcoal is simpler to administer, causes fewer complications, and doesn’t carry the same risks of physical injury or aspiration that come with lavage. It’s associated with few side effects for most patients. The main limitations are that charcoal doesn’t bind to every substance (it’s ineffective against things like alcohol, iron, or lithium) and that it still works best when given soon after ingestion.
What Recovery Looks Like
Once the tube is removed, healthcare providers monitor the patient for the next several hours. They watch for signs of complications from both the procedure itself and the substance that was ingested. If the stomach was pumped in preparation for surgery rather than for poisoning, the tube may stay in place for a few days. Most people experience a sore throat and some nausea afterward, which typically resolves within a day. The broader recovery depends entirely on what prompted the procedure in the first place: someone treated for a minor overdose may go home the same day, while a more serious poisoning could require extended hospital care.