Answer
Avoid it because grapefruit juice may reduce formation of losartan’s active metabolite and potentially reduce its effect.
Sources for this answer
- Losartan Potassium and Hydrochlorothiazide 100/12.5mg tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.