Nortriptyline for chronic pain

Sounds like 'nor-TRIP-ti-leen'

Nortriptyline is used to treat many types of persistent pain including nerve pain. Find out how to take it safely and possible side effects. Nortriptyline is also called Norpress.

What is nortriptyline?

Nortriptyline is used to treat many types of persistent pain. It is especially good for nerve pain such as burning, shooting or stabbing pain, and for pain that keeps you awake at night. Nortriptyline works by increasing the amount of specific nerve transmitters in the nervous system, reducing pain messages arriving in the brain. Once you start nortriptyline it usually takes a week or so for pain to begin to wear off.

Note: Nortriptyline is also used to treat depression and to help quit smoking. This page focuses on its use for persistent pain. 


In Aotearoa New Zealand nortriptyline is available as tablets (10 mg and 25 mg).

  • The usual dose to treat nerve pain in adults is 10 mg a day. This can be increased if necessary. The maximum dose of nortriptyline for treating pain is 75mg a day, but this amount is only prescribed under the supervision of a pain specialist.
  • Always take your nortriptyline exactly as your doctor has told you. The pharmacy label on your medicine will tell you how much nortriptyline to take, how often to take it, and any special instructions.

How to take nortriptyline

  • Swallow the tablets whole with a glass of water: Do not crush or chew the tablets.
  • Timing: You can take nortriptyline with or without food. It is best to take nortriptyline in the evening. Start by taking it 1 hour before going to bed, if you find that you feel drowsy the next morning, try taking it earlier in the evening. 
  • Missed dose: If you forget to take your dose, take it as soon as you remember that day. But if it is nearly time for your next dose, just take the next dose at the right time. If you only take one dose at bedtime and you miss the dose, do not take the medicine in the morning. Wait until the next night and skip the missed dose.
  • Keep taking nortriptyline regularly: You may notice some initial benefit within 2 weeks, however it may take up to 2 months for a full effect. 
  • If you think nortriptyline is not working for you: Nortriptyline does not work for everyone. If you do not feel any improvement in your pain after 2 months, do not suddenly stop taking the tablets but speak to your doctor about other options.

Things to consider when taking nortriptyline

Nortriptyline may affect your ability to drive: Nortriptyline can affect your concentration (how you focus or pay attention). It can slow your reaction times and cause sleepiness, blurred vision, dizziness, or make you feel anxious or jittery. Be careful when driving or using tools until you know how this medicine affects you. Do not drive if you experience any of these. If you are a driver, talk to your doctor about your concerns.

Possible side effects of nortriptyline?

Like all medicines, nortriptyline can cause side effects, although not everyone gets them. Often side effects improve as your body gets used to the new medicine.

Side effects What should I do?
  • Dry mouth
  • Feeling sick (nausea)
  • Headache
  • Constipation
  • These are quite common when you first start taking nortriptyline and usually go away with time.
  • Tell your doctor if you are finding they bother you.
  • Tell your doctor.
  • Read about palpitations including when to seek emergency help.
  • Drowsiness
  • Light-headed
  • Be careful when driving or using tools until you know how this medicine affects you.
  • You will have a greater risk of falls and injuries, especially if you are elderly. Tell your doctor if you are concerned.
  • Do not drink alcohol. Read about medicines and alcohol.
  • Suicidal feelings or behaviour such as agitation, aggression, self-harm, worsening of low mood
  • Contact your doctor immediately.
  • For urgent help contact Healthline 0800 611 116 or Lifeline 0800 543 354 (available 24/7).
Did you know that you can report a side effect to a medicine to CARM (Centre for Adverse Reactions Monitoring)? Report a side effect to a product.

Learn more

The following links have more information on nortriptyline.

Norpress Medsafe Consumer Information Sheet, NZ
Nortriptyline NZ Formulary Patient Information, NZ


  1. Nortriptyline NZ Formulary, NZ, May 2022
  2. Diagnosing and managing headache in adults in primary care BPAC, NZ, 2017
  3. The role of medicines in the management of depression in primary care BPAC, NZ, 2017

Additional resources for healthcare professionals

Medicines, dry mouth and tooth decay Medsafe, NZ, 2013
The diagnosis and management of herpes zoster and its complications BPAC, NZ, 2014
Sleep disturbances – managing parasomnias in general practice BPAC, NZ, 2012

Credits: Health Navigator Pharmacists. Reviewed By: Sandra Ponen, BPharm, MPH, Auckland Last reviewed: 07 Jun 2022