Drug Interaction Report

Lorlatinib may reduce the blood levels and effects of alfuzosin. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Let your doctor know if alfuzosin becomes less effective or is no longer controlling your symptoms. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Do not consume grapefruit or grapefruit juice during treatment with lorlatinib. Grapefruit juice can significantly increase the blood levels and effects of lorlatinib, which may result in a greater risk of side effects. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both. Talk to your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Food can enhance the levels of alfuzosin in your body. Alfuzosin should be taken just after eating food. This will make it easier for your body to absorb the medication. Take alfuzosin after the same meal each day. Do not take it on an empty stomach.