A Fleet enema is a pre-filled, disposable squeeze bottle designed to relieve constipation within minutes. The standard saline version is the fastest-acting type of over-the-counter enema, typically producing a bowel movement in 1 to 5 minutes. Using one correctly is straightforward, but proper positioning and technique make the difference between a smooth experience and an uncomfortable one.
How a Fleet Enema Works
The most common Fleet product is a saline (sodium phosphate) enema. It works by pulling water from the wall of your colon into the stool sitting inside it. This softens the stool and increases its bulk, which triggers your colon to contract and push everything out. Because it draws water into the bowel rather than just adding fluid, it tends to work faster than other enema types.
Fleet also makes two other formulas. A mineral oil enema coats and lubricates stool so it can slide through more easily, and it generally takes longer to work. A bisacodyl enema directly stimulates the muscles of the colon to contract, pushing stool out. The saline version is the one most people reach for, and the steps below apply to all three types.
What You Need Before You Start
Gather a few things to make the process easier: the Fleet enema bottle, a towel or pad to lie on, and access to a toilet nearby. Most Fleet enemas come with a pre-lubricated tip, but if yours feels dry or you want extra comfort, a small amount of water-based lubricant on the tip helps. Avoid petroleum-based products.
Remove the protective shield from the enema tip. Do not cut or alter the tip in any way. Some liquid may leak slightly once the cap is off, so hold the bottle upright until you’re ready.
Step-by-Step Instructions
Get into one of two positions. The most commonly recommended is lying on your left side with your right knee bent toward your chest. This follows the natural curve of your lower colon and lets gravity help the liquid flow where it needs to go. Alternatively, you can kneel and lower your chest toward the floor, resting on your forearms. Either position works. Lying on your left side is generally the easiest if you’re doing this alone.
Gently insert the lubricated tip into the rectum. Aim the tip toward your navel, not straight up. Push slowly and stop if you feel sharp resistance. The tip only needs to go in about two inches for an adult. Once it’s in place, squeeze the bottle steadily until nearly all the liquid is inside. You don’t need to get every last drop. Keep the bottle squeezed as you remove the tip so the liquid doesn’t get sucked back in.
Stay in position and try to hold the liquid for as long as you comfortably can. Even a few minutes helps the solution do its job. For the saline version, you’ll likely feel a strong urge to go within 1 to 5 minutes. Mineral oil enemas work better when held longer, since the oil needs time to coat and lubricate the stool. When the urge becomes strong, move to the toilet.
What to Expect Afterward
The first bowel movement usually comes quickly and may be mostly liquid. You may need to go several times over the next 30 to 60 minutes as your colon continues to empty. Stay close to a bathroom during this window. Some mild cramping is normal and typically passes once the bowel movement is complete.
If nothing happens within 30 minutes, something may be preventing the enema from working. Do not use a second enema in the same day. Using more than one sodium phosphate enema in 24 hours can cause dangerous shifts in your body’s fluid and electrolyte balance. If the enema doesn’t produce results, or if no liquid comes out at all, contact a healthcare provider.
Types of Fleet Enemas and When to Choose Each
The saline (sodium phosphate) enema is the standard choice for occasional constipation. It works the fastest and is the version most people mean when they say “Fleet enema.” Choose this one when you need quick relief.
The mineral oil enema is gentler and better suited for hard, dry stool. It lubricates rather than stimulating contractions, so it’s less likely to cause cramping. It takes longer to work, often 2 to 15 minutes, and benefits from being held as long as possible.
The bisacodyl enema stimulates the colon muscles directly. It’s sometimes used for bowel prep before medical procedures. It can cause more cramping than the other types because it forces the colon to contract.
Safety Concerns to Know About
Sodium phosphate enemas are safe for most adults when used occasionally, but they carry real risks for certain people. The sodium phosphate in these products can cause dangerous changes in blood electrolytes, particularly phosphate, calcium, sodium, and potassium levels. In rare cases, this has led to kidney damage, abnormal heart rhythms, and seizures.
You’re at higher risk for these complications if you have kidney disease, heart failure, or are dehydrated. People taking diuretics (water pills), blood pressure medications like ACE inhibitors or ARBs, or anti-inflammatory painkillers should use extra caution, since these drugs affect how the kidneys handle the phosphate load. Older adults are also at increased risk.
Do not use a Fleet saline enema for more than three days in a row. Do not use more than one enema per day. If constipation persists beyond a few days, the problem likely needs a different approach than repeated enema use.
Using Fleet Enemas in Children
Fleet makes a pediatric version (Pedia-Lax) in a smaller bottle. Children ages 5 to 11 can use one full pediatric bottle per day. Children ages 2 to 4 should receive only half a bottle, which means unscrewing the cap, removing two tablespoons of liquid with a measuring spoon, then replacing the cap before use. Children under 2 should never receive a sodium phosphate enema.
The same safety rules apply to children as adults, with even more caution. Do not use a pediatric enema if the child has kidney disease, heart problems, or is dehydrated. Do not give another sodium phosphate product at the same time. If the child has no bowel movement and no liquid comes out within 30 minutes, or if you notice rectal bleeding, dizziness, vomiting, or decreased urination, stop and seek medical attention. These can be signs of dehydration or electrolyte disturbance, which is more dangerous in children than adults due to their smaller body size.
Troubleshooting Common Problems
If the liquid leaks out immediately after insertion, you may not have inserted the tip far enough, or you may need to adjust your position. Lying on your left side with your knees pulled closer to your chest can help the liquid stay in. Squeezing your buttocks together after removing the tip also helps.
If insertion is uncomfortable, use more lubricant and try to relax. Bearing down slightly, as if you’re about to have a bowel movement, can relax the muscles around the rectum and make insertion easier. Never force the tip past resistance, as this can cause tearing.
If you experience severe abdominal pain, heavy rectal bleeding, or blood clots in your stool after using an enema, these are signs something has gone wrong. A sudden drop in blood pressure with lightheadedness or feeling faint also warrants immediate medical care. Mild discomfort and light spotting can happen normally, but sharp pain and significant bleeding are not expected.