Here are some commonly asked questions to give you more information about Circadin and sleep problems.

No toggle
1. How do I know I have a sleep problem?

Many people have trouble falling asleep, staying asleep or feel that their sleep is restless, light or of poor quality, waking up unrestored. Every person’s concept of a ‘good night’s sleep’ varies, so the amount of sleep considered ‘a problem’ for one person may not be an issue for someone else. However, sleep problems can start to arise when you are concerned about the lack of sleep or the sleep quality you are getting, if it starts making you feel tired or sleepy during the daytime, or is affecting how well you function at work or when doing everyday activities.

If you are unsure about how well you sleep, try keeping a sleep diary to help keep track of your sleep patterns and how you are feeling.

Please click here to download a sleep diary.

If you are concerned about the amount or the quality of your sleep, it is important to seek advice from your doctor or your pharmacist.

2. What is sleep hygiene?

Sleep hygiene refers to a range of everyday habits that can help you sleep better, such as avoiding alcohol or caffeinated drinks (like tea, coffee, or cola) close to bedtime, waking up at the same time each morning, and ensuring your room is at a comfortable temperature.

Learn more about Sleep hygiene.

Please click here to download Sleep hygiene fact sheet.

3. What can I do to try and prevent sleep problems?

Poor sleep hygiene (sleep habits) is a common cause of sleep problems.

One of the most important steps in improving your sleep hygiene is to establish a regular sleep routine. This can involve maintaining regular pre-bed activities, keeping your bedroom surroundings relatively constant, and waking up at the same time each day. However, you should avoid going to bed if you aren’t tired, even if it means going to bed at irregular times.

Some other steps you could try include:

  • Avoiding caffeinated drinks and strenuous exercise before going to bed
  • Avoiding napping during the day
  • Limiting your alcohol and cigarette use before bedtime

Learn more about Sleep hygiene.

Please click here to download Sleep hygiene fact sheet.


4. Do I need a prescription to buy Circadin?

No – Circadin is now available from your local pharmacy without a prescription – but you will need to talk to your pharmacist first so they can decide if Circadin is right for you.

5. How long will Circadin take to work?

The sleep promoting effect of Circadin will be noticeable from taking the first tablet, but it may take 2-3 weeks until you feel that your sleep quality is improved.

It is important to take Circadin as directed by your pharmacist (Circadin should be used regularly at the same time each day, after food and 1-2 hours before you go to bed), and to follow good sleep hygiene tips (refer to the Sleep Hygiene Information).

Always speak to your doctor or pharmacist if you are unsure.

6. How is Circadin different to other melatonin tablets?

Circadin has a prolonged release formulation which means the melatonin is slowly released over the course of 8-10 hours and mimics your body’s natural patterns of melatonin release.1

Circadin is a pharmaceutical grade melatonin product – which means it has been carefully assessed for quality, efficacy and consistency, and has been approved for use in Australia.

7. Can I take Circadin if I am pregnant or breastfeeding?

It is not recommended to take Circadin if you are pregnant or breastfeeding (Circadin has not been studied in pregnant or breastfeeding women). Talk to your doctor for advice on taking Circadin or on taking medications during pregnancy/ breastfeeding.

8. Can I give Circadin to my child?

No – Circadin is only approved for use in people aged 55 years or over.

9. Can I get dependant on Circadin?

Melatonin is a hormone naturally produced by your body that regulates your sleep patterns and helps you fall asleep.

Your body is unlikely to become dependent on melatonin and there are no known withdrawal problems associated with Circadin when you stop taking it.2-4

10. What’s the best time to take Circadin?

Circadin is best taken after eating and 1-2 hours before you go to bed. Ideally, it should be taken at approximately the same time each day.

11. Will Circadin make me feel ‘groggy’ in the morning?

Circadin prolonged release formulation mimics the body’s natural melatonin levels, peaking at night and gradually falling towards morning.1

This allows you to wake up naturally, alert and without any grogginess.5

Circadin rarely causes drowsiness, nevertheless it is not recommended to drive or operate machinery for 8 hours after you take it.
Circadin does not impair morning alertness, but if you suffer from drowsiness during the day you should consult your doctor.

Talk to your doctor or pharmacist if you have any questions about melatonin and its potential side-effects.


The information provided is not intended to be a substitute for professional medical advice. Please speak to a healthcare professional if you have any questions about your sleep problem or its treatment.

No toggle
  1. Zisapel N. Drug Dev Res. 2000;50:226-234. Funded by Neurim Pharmaceuticals Ltd., Tel-Aviv, Israel
  2. Therapeutic Goods Administration. Notice of interim decisions on proposed amendments to the Poisons Standard. Department of Health. 2020.
  3. Arendt J. Front Endocrinol (Lausanne). 2019;10:391.
  4. Zisapel N. Open Neuroendocrinology J. 2010;3:85-95.
  5. Wade AG, et al. Curr Med Res Opin. 2007;23(10):2597-2605. Funded by Neurim Pharmaceuticals Ltd., Tel-Aviv, Israel