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Medicines LosartanQuestion & answer

Losartan · Medicine question

Can I drink grapefruit juice while taking losartan potassium?

iatroX medicinesMedicine guide reviewed 13 August 2026

The answer

Answer

It is best avoided because it may reduce formation of losartan’s active metabolite and potentially reduce its effect.

Sources for this answer

Losartan Potassium 25 mg Film-Coated Tablets 28's (POM) (PL 43461/0096) — Current selected SmPCemc · Summary of Product Characteristics
Losartan potassium 50mg — Current selected SmPCemc · Summary of Product Characteristics
NHS

NHS · NHS medicine guidance

General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.

The full medicine guide

Losartan

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

Read the Losartan guide

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Can losartan potassium be taken with food?Why are blood tests needed?Can losartan potassium cause dizziness?Can I use potassium salt substitutes?Can ibuprofen be taken with losartan potassium?Can losartan potassium tablets be crushed?