Digestive
Medicines for Pyloric stenosis
A condition in young babies where the muscle at the stomach outlet thickens, causing forceful vomiting after feeds — treated very successfully with a small operation.
Education and reference only. This explains which medicines are used and why, in plain language — it deliberately contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician, and check the BNF and the product labelling for prescribing detail.
Quick answer
What is Pyloric stenosis?
Pyloric stenosis is a condition affecting young babies, usually in the first few weeks to a couple of months of life, in which the muscle at the outlet of the stomach (the pylorus) becomes thickened and enlarged, narrowing the passage and making it hard for milk to pass from the stomach into the intestine. The characteristic sign is forceful, "projectile" vomiting after feeds — the milk is often thrown some distance — which typically becomes more frequent and forceful over days.
- How it is treated: Pyloric stenosis is treated very successfully with a small, straightforward operation.
- Self-care: This is a condition needing prompt medical treatment (surgery) rather than lifestyle management.
- When to seek help: See a doctor promptly about a young baby with forceful, projectile vomiting after feeds, especially if getting worse, with poor weight gain, fewer wet nappies, or hunger after vomiting.
What it is
Pyloric stenosis is a condition affecting young babies, usually in the first few weeks to a couple of months of life, in which the muscle at the outlet of the stomach (the pylorus) becomes thickened and enlarged, narrowing the passage and making it hard for milk to pass from the stomach into the intestine. The characteristic sign is forceful, "projectile" vomiting after feeds — the milk is often thrown some distance — which typically becomes more frequent and forceful over days. The baby is usually hungry again soon after vomiting (as little feed is getting through), and may fail to gain weight or lose weight, have fewer wet nappies, and become dehydrated. It is more common in boys and first-born babies and can run in families. Because it leads to dehydration and disturbances in the body's salts, it needs prompt diagnosis, which is confirmed with an ultrasound scan.
How it is treated
Pyloric stenosis is treated very successfully with a small, straightforward operation. First, the baby's hydration and salt balance are corrected with fluids given into a vein, as this must be put right before surgery. The operation (a pyloromyotomy) involves cutting through the thickened muscle to widen the outlet, which allows milk to pass normally; it is commonly done by keyhole surgery. Recovery is usually quick, and babies are able to feed normally soon afterwards, with an excellent long-term outlook and no lasting problems. Because the vomiting and dehydration can worsen, prompt assessment of a baby with forceful, repeated vomiting is important. The reassuring message is that, although it can be worrying, pyloric stenosis is very treatable, and babies do very well after the operation.
For this condition, these medicines
Medicine classes used for Pyloric stenosis
Each links to a full, dose-free guide — what it is, how it works, who can and cannot use it, side effects, interactions and FAQs.
Beyond medication
Lifestyle and self-care
This is a condition needing prompt medical treatment (surgery) rather than lifestyle management. The key point is seeking prompt assessment for a young baby with forceful, repeated vomiting, poor weight gain, or signs of dehydration.
When to get help
When to see a doctor
See a doctor promptly about a young baby with forceful, projectile vomiting after feeds, especially if getting worse, with poor weight gain, fewer wet nappies, or hunger after vomiting. Seek urgent care for signs of dehydration or a very unwell baby.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
Answers
Pyloric stenosis: frequently asked questions
What are the signs of pyloric stenosis?
Forceful, "projectile" vomiting after feeds in a young baby (usually in the first weeks of life), often becoming more frequent, with the baby hungry soon afterwards, poor weight gain, and possible dehydration. It needs prompt assessment.
How is pyloric stenosis treated?
With a small, very successful operation (pyloromyotomy) to widen the stomach outlet, after correcting the baby's hydration and salts first. Babies usually recover quickly, feed normally soon after, and have an excellent long-term outlook.
Sources
Where this is drawn from
- NHS — Pyloric stenosis
- British Association of Paediatric Surgeons guidance
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