Drug interactions
Nortriptyline + Thyroid desiccated
Severity: Moderate
Nortriptyline and Thyroid desiccated: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Thyroid hormone can heighten adrenergic receptor sensitivity, and tricyclic antidepressants may amplify this effect. The combination can increase the risk of tachycardia, arrhythmias and CNS stimulation, particularly in patients with cardiac disease or when thyroid doses are high.
What this interaction means in plain words
Nortriptyline and Thyroid desiccated can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Thyroid hormones increase catecholamine receptor sensitivity, adding to the adrenergic potentiation produced by tricyclic reuptake inhibition.
What to do
Monitor heart rate, rhythm and mental status when starting or changing thyroid dose, and use the lowest effective doses of both. Consider an ECG in patients with underlying heart disease.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Nortriptyline with Thyroid desiccated?
MediHelp rates the interaction as moderate. Nortriptyline and Thyroid desiccated can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Thyroid hormone can heighten adrenergic receptor sensitivity, and tricyclic antidepressants may amplify this effect. The combination can increase the risk of tachycardia, arrhythmias and CNS stimulation, particularly in patients with cardiac disease or when thyroid doses are high.
How serious is the interaction between Nortriptyline and Thyroid desiccated?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate, rhythm and mental status when starting or changing thyroid dose, and use the lowest effective doses of both. Consider an ECG in patients with underlying heart disease.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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