Linezolid and Nortriptyline interaction
Linezolid and Nortriptyline: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Linezolid label · effective 2026-06-19
• Serotonin Syndrome: Monitor patients taking Linezolid injection concomitantly with serotonergic agents for signs of serotonin syndrome.
If signs or symptoms of serotonin syndrome occur, consider discontinuing Linezolid injection and/or concomitant serotonergic agents.
Serotonin Syndrome Spontaneous reports of serotonin syndrome including fatal cases associated with the concomitant use of linezolid and serotonergic agents have been reported.
Monitor patients for the emergence of serotonin syndrome with the concomitant use of Linezolid injection and serotonergic agents or with use of Linezolid injection in patients with carcinoid syndrome.
Inform patients of the increased risk of serotonin syndrome when Linezolid injection is used concomitantly with serotonergic agents.
From the Nortriptyline (PAMELOR) label · effective 2024-12-04
Starting Pamelor in a patient who is being treated with MAOIs such as linezolid or intravenous methylene blue is also contraindicated because of an increased risk of serotonin syndrome ( see WARNINGS and DOSAGE AND ADMINISTRATION ).
CONTRAINDICATIONS Monoamine Oxidase Inhibitors (MAOIs) The use of MAOIs intended to treat psychiatric disorders with Pamelor or within 14 days of stopping treatment with Pamelor is contraindicated because of an increased risk of serotonin syndrome.
The use of Pamelor within 14 days of stopping an MAOI intended to treat psychiatric disorders is also contraindicated ( see WARNINGS and DOSAGE AND ADMINISTRATION ).
The concomitant use of Pamelor with MAOIs intended to treat psychiatric disorders is contraindicated.
Pamelor should be discontinued before initiating treatment with the MAOI ( see CONTRAINDICATIONS and DOSAGE AND ADMINISTRATION ).
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.