Nortriptyline Macleods Pharma Uk (Nortriptyline)

• Nortriptyline is a tricyclic antidepressant that modulates monoamine neurotransmission in depressive and pain disorders.
• Major depressive disorder: alleviates depressive symptoms and improves mood in adult patients.
• Depressive episodes: reduces severity and duration of episodic depression.
• Chronic neuropathic pain: provides analgesic benefit in neuropathic pain conditions.

• Nortriptyline inhibits the reuptake of norepinephrine and serotonin at neuronal synapses, increasing their extracellular concentrations. The elevated monoamines enhance neurotransmission in central pathways that regulate mood and pain perception. Additionally, nortriptyline blocks sodium channels and antagonizes certain muscarinic, histamine H1, and α1‑adrenergic receptors, contributing to its analgesic and side‑effect profile. These combined actions underlie its therapeutic effects in depression and neuropathic pain.

Nortriptyline may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects

• Dry mouth: reduced salivation leading to discomfort.
• Constipation: slowed gastrointestinal motility.
• Drowsiness: increased sedation, especially at treatment initiation.
• Blurred vision: transient visual disturbances.
• Weight gain: increased appetite and caloric intake.
• Orthostatic hypotension: dizziness upon standing.

Serious or Rare Side Effects

• Cardiac arrhythmia: irregular heart rhythm, especially in overdose.
• Seizures: heightened risk in susceptible individuals.
• Severe hypotension: marked drop in blood pressure.
• Serotonin syndrome: potentially life‑threatening condition when combined with other serotonergic agents.
• Agranulocytosis: dangerous drop in white blood cells.
• Suicidal thoughts: emergence or worsening of suicidal ideation.

• When prescribing nortriptyline, clinicians should observe several safety measures.
• Dose titration: start with a low dose and increase gradually under medical supervision.
• Cardiovascular assessment: evaluate ECG and cardiac history before initiating therapy.
• Concomitant CNS depressants: avoid or monitor for enhanced sedation.
• Alcohol use: limit intake as it may increase central nervous system depression.
• Pregnancy and lactation: assess risk‑benefit; use only if clearly needed.
• Store at ambient temperature: keep below 25 °C, in original container, protected from moisture and light.

Nortriptyline interacts with several drug classes; awareness helps prevent adverse events.

Major Interactions (Avoid)

• MAO inhibitors: concurrent use can precipitate hypertensive crisis or serotonin syndrome.
• SSRIs and other serotonergic agents: increase risk of serotonin syndrome.
• CYP2D6 inhibitors (e.g., fluoxetine, paroxetine): raise nortriptyline plasma levels, risking toxicity.

Moderate Interactions (Monitor Closely)

• Anticholinergic drugs: additive dry mouth, constipation, urinary retention.
• CNS depressants (benzodiazepines, opioids): enhanced sedation and respiratory depression.
• Diuretics: may potentiate orthostatic hypotension.