Expressing

What you need to know about 'pumping and dumping'

Article By

Sonni-Ann

Published On

19 Nov, 2025

Read Time

4 minutes

Pump and dump simply means expressing milk and choosing not to give that milk to your baby.
It’s useful when you’re uncomfortable, protecting supply while away from your baby, or following medical advice after certain medications or procedures.
Alcohol leaves breast milk at the same rate it leaves your bloodstream, so pumping won’t speed that up.

If you’ve ever typed “pump and dump” into your search bar during a well-earned night out, you’re in good company. The phrase gets thrown around a lot, usually with a mix of panic and guesswork. But the reality is far calmer, far simpler, and far kinder to you.

Let’s break it down in a way that actually helps.

What “Pump and Dump” really means

Despite the dramatic name, pump and dump is simply expressing milk and choosing not to feed it to your baby.

Parents usually do this when:

They’re uncomfortable and need relief
They want to protect supply while away from their baby
A healthcare professional advises it after certain medications or procedures

When you don’t need to pump and dump

There’s a lot of myth around this topic, and most of it adds unnecessary pressure. In many everyday situations, pumping and dumping isn’t needed at all.

One of the biggest myths? That you must always pump and dump after having a drink. You don’t always need to. Alcohol doesn’t sit in your breast milk waiting to be pumped out. It naturally leaves your milk at the same pace it leaves your bloodstream. Pumping won’t speed this up, it only helps if your breasts feel full or uncomfortable.

Drinking alcohol while breastfeeding: What you actually need to know

If you choose to have a drink, here’s some practical guidance:

A small glass of wine, half a pint of beer, or a single measure of spirits typically takes around two hours per drink to clear from your system.
The more you drink, the longer your body will take to metabolise the alcohol.
There’s no need to pump and dump unless you’re feeling full and want to relieve pressure.
If you’d like to feed during that waiting window, you can express beforehand and keep that milk ready to go.

Once those two hours have passed per drink, you can breastfeed as normal.

When pumping and dumping is helpful

There are some moments when you might choose to pump and dump, such as:

If your GP or midwife advises a temporary pause in breastfeeding after a specific medication or procedure
If you’re pumping purely to stay comfortable when away from your baby
If you’ve been exposed to something medically confirmed as unsafe for baby

How to pump and dump

If you do need to pump and dump, here’s the fuss-free way to do it:

Express until you’re comfortable, with a pump or by hand.
Discard that milk.
Carry on as normal once you’ve been advised it’s safe to resume feeding.

Pumping and dumping: Myths vs. Facts

✘ Myth	✔ Fact
Breast milk stores alcohol until you pump it out.	It clears naturally as your body metabolises alcohol.
Pumping and dumping is always the safest option.	It’s only needed in specific situations.
Any alcholic drink means your breast milk must go.	One drink usually clears in around two hours, and there’s no need to discard unless you’re uncomfortable.

Trusting yourself

Feeding shouldn’t be another source of pressure. Most of the time, you don’t need to throw milk away, rush for the pump, or second-guess yourself. Your body knows what it’s doing. Your intuition is stronger than you think. And when all you need is a clear, honest answer, we’re right here.

Explore the Range

Breast Pumps & Expressing

I’ve had one drink, do I need to pump and dump?

No. Only pump if you’re uncomfortable. Alcohol clears from your milk as it clears from your bloodstream, usually about two hours per drink, so just wait a while, then you can express or breast feed as normal. Planning drinks around your baby's feeding schedule helps minimise exposure, and having stored milk available provides a safe backup option when needed.

How might alcohol affect my breast milk and my baby?

Alcohol does reach your breast milk, matching the level in your bloodstream. The more you drink, the more your baby is exposed. This can mean they take in less milk, seem unusually sleepy, or have their sleep rhythm knocked off balance.