Can I eat grapefruit after receiving a heparin injection?

Mar 17, 2025 Source: Cainiu Health
Disease description:

Physical issues with heparin injection. Today my family bought some pomelos, and I couldn't resist having a few pieces. I wonder if eating pomelo after heparin injection would cause any problems?

Doctor's answer (1)
Dr. Tian Hongbo

Generally, it is not recommended to eat grapefruit while receiving heparin injections.

Heparin is an anticoagulant medication primarily used to prevent and treat thromboembolic diseases. Its mechanism of action involves enhancing the activity of antithrombin III, thereby inhibiting coagulation factors Xa and IIa to achieve anticoagulant effects. Grapefruit contains a compound called furanocoumarin, which can inhibit the CYP3A4 enzyme in the liver. This enzyme is responsible for metabolizing various medications in the body, including certain anticoagulants. Therefore, during heparin therapy, it is advisable to avoid consuming large amounts of grapefruit or grapefruit-containing products.

If patients receiving heparin wish to eat grapefruit, they should consume it in moderation and pay attention to any bodily reactions. If any discomfort or concerns arise, they should promptly consult a physician or pharmacist. Additionally, patients should maintain a balanced diet rich in high-quality protein and vitamins to enhance immune function and overall resistance.

Throughout the treatment process, patients should follow medical advice and prescriptions closely and pay attention to dietary adjustments to ensure the effectiveness and safety of the medication.