Medications and Breastfeeding

In the past it was common to be told that breastfeeding could not continue whilst the mother was taking medication. More recently, evidence-based information has become more widely available for clinicians. The vast majority of drugs can be taken during breastfeeding, but you need to take care to check on the suitability of any medication that you have been prescribed or have purchased. The good news is that there are drugs to treat almost all medical conditions without harm to a breastfeeding baby. AIMS therefore suggests that you discuss with your doctor (or whoever has prescribed the medication) the balance of risks and benefits of taking a particular drug, including the impact on breastfeeding.

However, if you have been told that you need to stop or interrupt breastfeeding, please ensure that specialist sources of information have been checked rather than just the standard BNF (British National Formulary).[1,2] Medications are used for many different reasons at different stages of breastfeeding, and this information leaflet can only act as a brief introduction to some of the broader issues. It does not cover all medications or go into great detail, but is an introduction to some common medications and provides additional resources for extra information.

Can I breastfeed while on medication?

If you are on any medication, whether short- or long-term, you may want to discuss antenatally if there may be any impact on breastfeeding once the baby is born. It is good to do this with your team of specialists before your baby is born to see whether there is a need to change your medication and, if so, when. This discussion should be documented in your notes.

How might drugs affect breastfeeding?

The medications we take are processed and passed through the body in different ways. Some of those drugs pass through breastmilk and have different effects on the baby; including temporarily causing loose bowel motions, drowsiness, or constipation. Despite this, there are fewer adverse effects associated with drugs passing through breastmilk than might be imagined[3]. Parents and carers should still be informed of possible or expected side effects and when changes in behaviour may need to be discussed with a doctor.


Opioid drugs used for pain relief, for example after a caesarean birth, can make a baby drowsy or cause them to feed less frequently or effectively. Dihydrocodeine or morphine are the preferred drugs in this class. They should be used at the lowest possible dose and for as short a period as possible. Other drug options such as non-steroidal anti inflammatories (ibuprofen, diclofenac and naproxen) pass into milk at very low levels. New mothers should not have to feel that they cannot take painkillers or manage pain if they are breastfeeding. Your midwife or breastfeeding supporter will be able to help with this.[4]


Antibiotics, which may be given during labour or after birth, frequently cause babies to produce loose, runny poo and sometimes to have intestinal pains. This resolves by itself, without medical intervention, but seek help if you are worried[2].

Other resources

Information about medications and breastfeeding can be overwhelming and confusing. There are many conditions for which you may need to take medication, particularly if you have a chronic condition. Please seek information from the sources listed below if you require more information.

Some of the conditions for which you may need or be offered medication include :

● depression or anxiety

● pain (NB codeine should not be taken during breastfeeding[5])

● infection requiring antibiotics[6]

● hayfever[6]

● migraine[6]

● snuffling with a cold (NB avoid decongestant tablets which can reduce milk supply even with just one dose)[6]

● piles or haemorrhoids[6]

The patient information leaflet in some over-the-counter medicines may say that a medication is unsuitable for breastfeeding mothers. This is generally because the manufacturer has not conducted pregnancy- or breastfeeding-specific research and so may not take responsibility for any adverse impacts that mothers or babies may experience─ even later, when much is known about the drug.

Please check with the pharmacist, the Breastfeeding Network Drugs in Breastmilk Helpline (, or Breastfeeding and Medication (

Other sources of information are ,or which also has factsheets and is free to access and is run by trained volunteers.

The NICE Guideline[7] recommends that health carers need to use expert sources rather than rely on the BNF when prescribing for breastfeeding mothers. Sources suggested by the guideline are:

Further sources with an associated cost are available (see list below).


In making a decision on which drug to prescribe, you and your healthcare professional need to consider many factors; such as the need for any particular drug, as well as the evidence-base for the compatibility of that drug with breastfeeding (which may not be solely the BNF or patient information leaflet). The prescriber should seek to protect your breastfeeding wherever possible, if that is your chosen feeding option. Sudden interruption of breastfeeding may result in mastitis.

There are medications available to treat the majority of conditions for which you may need to take medication. This information is intended to provide only an introduction, with links to other sources. Any drug which can be prescribed for a child would normally be considered compatible with breastfeeding as normal. Parents should always be made aware of any expected effects which the baby might exhibit.


[1] Marshall J et al. (2021) Providing effective evidence-based support for breastfeeding women in primary care BMJ 2021: 375: e065927

[2] Jones W (2021) How to advise women on the safe use of medicines while breastfeeding Pharmaceutical Journal May 2021

[3] Anderson PO, Pochop SL, Manoguerra AS. (2003) Adverse drug reactions in breastfed infants: less than imagined. Clinical Pediatrics: 42(4):325-40.

[4] NIHR Better pain relief for women in labour

[5] Koren G (2007) Medication Safety in Pregnancy and Breastfeeding. McGraw-Hill

[6] Jones W (2018) Breastfeeding and Medication. Routledge 2nd edition.

[7] NICE Maternal and Child Nutrition PH11

Further Reading

● Ainsworth SB (2014) Neonatal Formulary: Drug Use in Pregnancy and the First Year of Life 7th Edition Wiley Blackwell and BMJ Books

● Al-Zidan RN (2020) Drugs in Pregnancy: A Handbook for Pharmacists and Physicians 1st Edition

● Briggs G et al. (2021) Briggs Drugs in Pregnancy and Lactation: A Reference Guide to Fetal and Neonatal Risk 12th Edition. Lippincott Williams and Wilkins

● Brown A, Jones W (ED) (2020) A Guide to Supporting Breastfeeding for Medical Professionals. 1st Edition. Routledge: London

● Forinash A B and Freeman K Drugs in Pregnancy and Lactation (2017)

● Hale TW (2020) Medications and Mothers Milk. Springer Publishing Company (or online

● Jones W (2020) Breastfeeding and Chronic Medical Conditions. Kindle

● Jones W (2018) Breastfeeding and Medication 2nd Edition. Routledge

● Jones W (2017) Why Mothers Medication Matters. Pinter and Martin

● Jones W (2016) The importance of dads and grandmas to the breastfeeding mother.Praeclarus Press

● Koren G (2004) The Complete Guide to Everyday Risks in Pregnancy andBreastfeeding. R Rose.

● Priest J, Attawell K (1998) Drugs in Conception, Pregnancy and Childbirth Paperback

Freely available sources of information and support on medication and breastfeeding

Lactmed (freely available online)

Specialist Pharmacy Service (information here)

Breastfeeding Network Fact sheets (can be emailed or contacted via Facebook

Breastfeeding and Medication (Dr Wendy Jones) : Factsheets (can be emailed or contacted via Facebook )

Written by: Wendy Jones
Reviewed by: Nadia Higson, Debbie Chippington Derrick
Reviewed on: 09/02/2023
Next review needed: 09/02/2025

AIMS does not give medical advice. Our website provides evidence-based information to support informed decision-making. The AIMS Helpline volunteers will be happy to provide further information and support. Please email or ring 0300 365 0663.

If you found this information page helpful please consider making a donation to support the work of AIMS. We are a small charity that accepts no commercial sponsorship, in order to preserve our reputation for providing impartial, evidence-based information. You can make donations at Peoples Fundraising. To become an AIMS member or join our mailing list see Join AIMS

AIMS supports all maternity service users to navigate the system as it exists, and campaigns for a system which truly meets the needs of all.

Latest Content


« »

Mental health and pregnancy - Phoeb…

AIMS Journal, 2024, Vol 36, No 2 By Phoebe Howe In early 2016, I was diagnosed with Emotionally Unstable Personality Disorder (EUPD, formally known as Borderline Personal…

Read more

Type 1 diabetes and maternity care:…

AIMS Journal, 2024, Vol 36, No 2 By Jane Furness My daughter is two and a half years old now, but I still have daily flashbacks of our pregnancy and birth together. My hu…

Read more

Epilepsy and pregnancy

AIMS Journal, 2024, Vol 36, No 2 Kim Morley is a nurse and midwife with advanced qualifications who has been instrumental in providing specialised care for women with epi…

Read more


« »

Birth Rites Collection Summer Schoo… It is a 4-day in person and online summer school which has a programme of artists presenting their work. This year the themes are…

Read more

Latest Campaigns

« »

Birth Trauma Inquiry Open Letter in…

We write this letter in response to the recently published APPG Report on Birth Trauma which can be found here The report was extremely moving and we honour the brave con…

Read more

Evidence Submission to The House of…

Find submission on UK Parliament webite Introduction AIMS (Association for Improvements in the Maternity Servi…

Read more

What are the priorities for midwife…

AIMS is proud to be supporting the RCM's Research Prioritisation project as a Project Partner and with one of our volunteers on the Steering Group…

Read more