Be careful when drinking alcohol as it may affect how Sintrom thins your blood. You should avoid drinking cranberry juice or taking other cranberry products, such as capsules or concentrates as this could mean you do not receive the correct amount of acenocoumarol. You should not receive any injections into your muscles whilst you are taking Sintrom as it contains lactose. If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor or pharmacist before taking this medicinal product. You should not take Sintrom if you: are allergic to acenocoumarol, or similar medicines to thin the blood called coumarin derivatives or to any of the ingredients in Sintrom, are pregnant or breast-feeding, are an alcoholic or have chest pain, have any mental illness for example, schizophrenia, have, or are about to have an operation on your spine, brain, eyes or any major surgery, had a stroke caused by bleeding into your brain or have bleeding problems, suffer from very high blood pressure, have stomach ulcer or any intestinal bleeding, have severe liver or kidney disease. Before taking Sintrom, inform your doctor if you: have cancer, have an infection or swelling, have a disorder affecting the absorption of food from the stomach and/or intestine, have heart failure or liver problems, have kidney problems or an overactive thyroid, are elderly, suffer from a blood disorder such as protein C or protein S deficiency, have a higher risk of bleeding.
Tell your doctor, nurse, or pharmacist about all the medicines you take, including drugs prescribed by other doctors, vitamins, minerals, natural supplements, or alternative medicines. Sintrom may interact with: protease inhibitors – medicines used to treat HIV infection, methylprednisolone, a corticosteroid used to treat various inflammatory conditions, low blood sugar levels by medicines used for diabetes, medicines used to treat epilepsy such as phenytoin, anticancer medications, inflammation or pain medicines, medicines that stop platelets from clumping together, antibiotics, vitamin E or vitamin K, medicines known to increase the activity of some liver enzymes, medicines used to treat water retention and high blood pressure.