Herbs and medication: what to check before you start

Herbs are a lovely part of everyday life, from a cup of mint tea to a spoon of turmeric in dinner. But herbs are active plants, and some can interact with medication or are not suitable in certain situations. This short checklist helps you start safely.

Speak to a doctor or pharmacist first if you

• are pregnant, trying to conceive or breastfeeding
• take prescription medicine of any kind
• have a long-term condition such as high blood pressure, diabetes, a thyroid condition or liver or kidney disease
• are due to have surgery in the next few weeks
• are giving herbs to a child

Examples of why it matters

• St John's wort can reduce how well several medicines work, including some contraceptives.
• Liquorice in large amounts can raise blood pressure.
• Some herbs, such as ginger, garlic and ginkgo, can affect bleeding and are worth discussing if you take blood thinners.
• Herbs that affect blood sugar may need extra monitoring if you manage diabetes.

Good habits

• Introduce one new herb at a time, starting small.
• Stop and seek advice if you notice a rash, stomach upset or anything unusual.
• Tell your doctor about the herbs and supplements you take, the same way you would mention any medicine.
• Herbs are not a replacement for medical care. If symptoms persist or worry you, see a healthcare professional.

This article is general information and does not replace advice from a qualified health professional.