Glossary term

Contraindication: A contraindication is a reason a medicine should not be used, or should only be used with great caution, because the risk is too high.

EssentialClinicalSource quality: HighLast updated: 29 June 2026

Why this term matters

Patients often see the term in leaflets and pharmacy materials.

UK medical cannabis context

NICE specifically tells prescribers to consider pregnancy, breastfeeding, cardiovascular disease and mental health history.

What not to assume

Contraindications can relate to pregnancy, breastfeeding, psychiatric history, heart disease or allergies, depending on the product.

Careful wording: Avoid simplifying contraindications into blanket internet advice.

Related glossary terms

Related MCPH pages

Sources and review notes

This entry is educational vocabulary, not medical advice. Suitability, prescribing, product choice and monitoring belong with a qualified clinician or pharmacist.