Mirtazapine and Nortriptyline interaction

Mirtazapine 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.

Major

Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.

What the FDA labels say

From the Mirtazapine (REMERONSOLTAB) label · effective 2025-08-06

Major

Serotonin Syndrome : Increased risk when co-administered with other serotonergic drugs (e.g., SSRI, SNRI, triptans), but also when taken alone.

Warnings and precautionsby drug classView label on DailyMed
Major

Serotonin Syndrome Serotonergic antidepressants, including REMERON/REMERONSolTab, can precipitate serotonin syndrome, a potentially life-threatening condition.

Warnings and precautionsby drug classView label on DailyMed
Major

If concomitant use of REMERON/REMERONSolTab with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.

Warnings and precautionsby drug classView label on DailyMed
Major

Table 5: Clinically Important Drug Interactions with REMERON/REMERONSolTab Monoamine Oxidase Inhibitors (MAOIs) Clinical Impact The concomitant use of serotonergic drugs, including REMERON/REMERONSolTab, and MAOIs increases the risk of serotonin syndrome.

Drug interactionsby drug classView label on DailyMed
Major

If serotonin syndrome occurs, consider discontinuation of REMERON/REMERONSolTab and/or concomitant serotonergic drugs [see Warnings and Precautions (5.3) ].

Drug interactionsby drug classView label on DailyMed

From the Nortriptyline (PAMELOR) label · effective 2024-12-04

Major

Anyone considering the use of nortriptyline hydrochloride or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need.

Boxed warningby drug classView label on DailyMed
Minor

Serotonin Syndrome The development of a potentially life-threatening serotonin syndrome has been reported with SNRIs and SSRIs, including Pamelor, alone but particularly with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, and St.

Warningsby drug classView label on DailyMed
Minor

If concomitant use of Pamelor with other serotonergic drugs, including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, buspirone, tryptophan, and St.

Warningsby drug classView label on DailyMed
Minor

The drugs that inhibit cytochrome P450 2D6 include some that are not metabolized by the enzyme (quinidine; cimetidine) and many that are substrates for P450 2D6 (many other antidepressants, phenothiazines, and the Type 1C antiarrhythmics propafenone and flecainide).

Drug interactionsby drug classView label on DailyMed

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Not 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.