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Idiopathic Hypersomnia & Narcolepsy
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FEATURED POSTS


Identifying Genuine Cataplexy in Narcolepsy
Identifying Genuine Cataplexy in Narcolepsy
What cataplexy is, how it presents, and important features that help distinguish genuine cataplexy from other experiences

Michelle Chadwick
Aug 104 min read


Sodium Oxybate in Australia
Sodium oxybate is now a TGA-approved medicine in Australia for the treatment of narcolepsy. On 9 July 2026, a generic brand of sodium oxybate became a TGA-approved medicine in Australia following its inclusion on the Australian Register of Therapeutic Goods (ARTG). It is important to note that this approval is for narcolepsy only. Sodium oxybate is not approved in Australia for idiopathic hypersomnia. There are currently no medications approved specifically for idiopathic hyp

Michelle Chadwick
Jul 104 min read


New research: Sleep regulation is disrupted in Idiopathic Hypersomnia
A new study published in SLEEP (2026) provides strong evidence that the body’s normal “sleep pressure” system doesn’t function properly in people living with Idiopathic Hypersomnia (IH). This might sound technical, but it helps explain something many people with IH experience every day. What is “sleep pressure”? Sleep pressure is the brain’s built-in drive for sleep. In a typical system, it: builds up while you’re awake reduces during sleep resets overnight so you wake up fee

Michelle Chadwick
May 163 min read


Idiopathic Hypersomnia Day – 13 June 2026
Idiopathic Hypersomnia Day (IH Day) is a global awareness day focused on increasing understanding of idiopathic hypersomnia (IH). IH Day is an opportunity to raise awareness, share lived experience, challenge misconceptions, and build greater understanding of what it is really like to live with IH. Increased awareness is a critical step toward improving diagnosis, access to treatment, and quality of life. Hypersomnolence Australia is proud to continue this work as part of a g

Michelle Chadwick
May 42 min read


Idiopathic Hypersomnia causes more than just sleepiness
Articled update: May 2026 - new research added The main symptom of Idiopathic Hypersomnia (IH) is an overwhelming need for excessive sleep. Despite adequate and often extraordinary amounts of good quality sleep (e.g., 10–11 hours or more per night), people with IH are in an almost constant state of sleepiness. But IH is much more than that. New research continues to reinforce what people living with IH have been trying to explain for years: Idiopathic Hypersomnia is a 24-hour

Michelle Chadwick
Feb 54 min read


From Diagnosis to Aftercare
Guidance for Health Professionals supporting individuals with Narcolepsy and Idiopathic Hypersomnia The relief individuals may experience when diagnosed with narcolepsy and idiopathic hypersomnia, the confirmation that they have a genuine disorder, is often short-lived. This document aims to guide health professionals in helping individuals prepare for this adjustment and support them in managing their expectations. Click here to download a copy of this information. Discus

Michelle Chadwick
Nov 3, 20254 min read


Top Tips for Living with Hypersomnia
Top Tips for Living with Hypersomnia. Practical advice for Patients, Carers, and treating Doctors.

Michelle Chadwick
Nov 3, 20255 min read


Update on Xyrem® (Sodium Oxybate) Supply in Australia
Find more updated information on access to Sodium Oxybate here Many people living with Narcolepsy or Idiopathic Hypersomnia (IH) have been asking what’s happening with Xyrem® (sodium oxybate) supply in Australia. I have met with representatives from UCB Pharma and also communicated directly with MedSurge, the company now supporting supply. Here’s what we can confirm - and why you can still access treatment. What’s happening UCB Pharma, who have been importing and supplying

Michelle Chadwick
Oct 31, 20252 min read


Sleep DownUnder 2025 Highlights
From the perspective of Central Disorders of Hypersomnolence - Idiopathic Hypersomnia & Narcolepsy

Michelle Chadwick
Oct 25, 202521 min read
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RARE DISEASE DAY
Rare Disease Day is held on the last day of February every year to raise awareness of rare diseases. Idiopathic Hypersomnia is a rare...


Life after Diagnosis - Live your best life.
'LIFE AFTER DIAGNOSIS - Insights into how to live your best life' is a 3 part presentation and discussion on ‘Improving overall health and wellbeing and how that can have a positive impact on managing IH symptoms’. Taking a holistic approach to managing IH is vital. Incorporating physical, mental, emotional, social, and spiritual components of health is essential to overall wellbeing. There are many things that can have an impact on the severity of our IH symptoms and our abi


Catch up on the latest NEWS - November 2023
Catch up on the latest NEWS - November 2023


Frequently Asked Questions
To avoid going over the same topic in our Living with IH Community catch ups please go over these FAQ prior to attending your first meeting. 1. Does a MSLT (Multiple Sleep Latency Test) diagnose idiopathic hypersomnia? No. There are several limitations to the MSLT. It can not confirm idiopathic hypersomnia or narcolepsy type 2 (without cataplexy). Please read the document MULTIPLE SLEEP LATENCY TEST (MSLT) What it does and doesn't tell a sleep physician for more information.


Idiopathic Hypersomnia has come a long way, and so have I
Michelle Chadwick is the founder of Hypersomnolence Australia (HA), the world’s first not for profit organisation to be dedicated to Idiopathic Hypersomnia (IH). In the same year, 2013, that Michelle started HA she created the worldwide Idiopathic Hypersomnia Awareness Week . In 2022 she gave a presentation at the Idiopathic Hypersomnia & Narcolepsy Education Day . This was an event she organised and included local and international speakers including Prof Yves Dauvilliers.


Idiopathic Hypersomnia is a neglected disorder
During her presentation at SLEEP 2022, Isabelle Arnulf, MD, PhD, senior neurologist and professor of neurology at the Pierre and Marie...


Narcolepsy & Idiopathic Hypersomnia Management Beyond Medication
On Wednesday 6th Sept at 7.30pm we will be holding a joint Living with IH and Living with Narcolepsy Catch up. There will be a special presentation by Gina Dennis, Narcolepsy & Idiopathic Hypersomnia Management Beyond Medication. See below for more details. LIVING WITH NARCOLEPSY & LIVING WITH IDIOPATHIC HYPERSOMNIA - Joint community group catch up. 6th SEPTEMBER - 7.30PM AEST Guest Speaker: Gina Dennis, CHC Topic : Narcolepsy & Idiopathic Hypersomnia Management Beyond Medic


Catch up on the latest NEWS - July 2023
Catch up on Idiopathic Hypersomnia & Narcolepsy NEWS - includes all the latest in AUSTRALIAN RESEARCH NEWS!


Living with Idiopathic Hypersomnia & Living with Narcolepsy Community Groups
Hypersomnolence Australia believes in providing quality support to individuals living with Idiopathic Hypersomnia (IH) and Narcolepsy,...


Electrolytes and Dehydration
Reducing carbohydrates in our diet can have a positive impact on overall health and wellbeing. It may also help improve our ability to manage symptoms of Idiopathic Hypersomnia (IH) and Narcolepsy. Carbohydrates act much like sugar in the body — causing spikes in blood glucose that are followed by dips. Those dips often trigger the familiar afternoon crashes, which are the last thing people with IH or narcolepsy need! One of the most important things to keep in mind when foll
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