skip to main content

brainstorm askiatroX medicines

simulations beta

loading page…

learn & practise

exams international doctors free questions Socratic Tutor rounds stat clinical connections academy journal tool guides

clinical reference

askiatroX knowledge centre medicines UK / NICE guidance international guidance calculators q&a library

trust & support

how it works methodology account & support frequently asked questions about us clinical safety consultancy

legal

mobile app · scan to download

Medicines cimetidineQuestion & answer

cimetidine · Medicine question

Does cimetidine cross the placenta and pass into breast milk?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Cimetidine crosses the placenta and passes into breast milk, so its use during pregnancy and lactation should be avoided unless essential.

Sources for this answer

Cimetidine 200mg/5ml Oral SolutionRosemont Pharmaceuticals Limited · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 9Document updated 12 August 2020

Sources checked 8 November 2026

Explore this learning need in CPDTake this topic to CPD, then choose your learning context and available question library.

The full medicine guide

More questions about cimetidine

How can cimetidine affect metformin levels?How can cimetidine affect warfarin levels?How long after taking oral cimetidine are peak plasma concentrations reached?How much alcohol does each 5 ml of Tagamet cimetidine syrup contain?What common side effects are reported with cimetidine?Which types of peptic ulcer is cimetidine indicated to treat?

cimetidine

Read the wider context, including uses, precautions and the sources behind this medicine guide.

Read the cimetidine guide

More clinical questions?

Explore the tools and reference material available on iatroX.

Explore askiatroX