Clinical trials · California
Idiopathic Hypersomnia clinical trials in California
We’re tracking 8 recruiting idiopathic hypersomnia studies with a site in California — including Phase 2, Phase 2/Phase 3, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07646678RecruitingPhase 2/Phase 3
TAK-360 Extension Study for Narcolepsy or Excessive Sleepiness
This is a follow-up study for people who already completed a TAK-360 trial for narcolepsy (a sleep disorder causing sudden sleep attacks) or idiopathic hypersomnia (excessive daytime sleepiness). Researchers want to see if continuing TAK-360 remains safe and effective for you.
Chula Vista, CaliforniaAges 18–71 - NCT06812078RecruitingPhase 2
TAK-360 for idiopathic hypersomnia
This study tests an investigational medication called TAK-360 for people with idiopathic hypersomnia (IH), a sleep disorder that causes excessive daytime sleepiness. The goal is to see if the drug can help reduce sleepiness and improve daily function.
Redwood City, CaliforniaAges 18–70 - NCT05837091RecruitingPhase 4
Low-dose sodium oxybate for idiopathic hypersomnia sleepiness
This trial tests whether low-dose sodium oxybate can improve symptoms in adults with idiopathic hypersomnia, a condition that causes excessive sleepiness. You’d likely be asked to pause this standard treatment briefly while baseline testing is completed, and you’d use reliable contraception during and after the study drug.
Redwood City, CaliforniaAges 18–65 - NCT07500090RecruitingPhase 3
Study of HBS-301 for idiopathic hypersomnia
This trial tests a new medication, HBS-301, in people with idiopathic hypersomnia (a condition causing excessive sleepiness without clear cause). It aims to see if the drug improves wakefulness and is safe.
Redwood City, CaliforniaAges 18 years+ - NCT07096674RecruitingPhase 2
Long-term study of ORX750 for narcolepsy and idiopathic hypersomnia
This trial is for people who have already completed the main CRYSTAL-1 study of ORX750. It tests the long-term safety and effects of the drug, so you can continue treatment if it was helping you.
Santa Ana, CaliforniaAges 18–65 - NCT06767683RecruitingPhase 2/Phase 3
Long-term study of ALKS 2680 for narcolepsy and idiopathic hypersomnia
This study continues treatment with the investigational drug ALKS 2680 for people who have already completed a previous ALKS 2680 study for narcolepsy or idiopathic hypersomnia. It aims to see how safe and effective the drug is over a longer period.
Los Angeles, CaliforniaAges 18–70 - NCT06752668RecruitingPhase 2
Testing ORX750 for narcolepsy and idiopathic hypersomnia
This trial tests an experimental drug called ORX750 for people with narcolepsy or idiopathic hypersomnia. You would need to stop your current sleepiness medicines to see if ORX750 helps reduce daytime sleepiness.
Long Beach, CaliforniaAges 18–65 - NCT07625280RecruitingPhase 3
Twice-nightly treatment for narcolepsy or idiopathic hypersomnia
This study tests whether taking the sleep medicine Xywav two times each night is safe and helps control symptoms better than a placebo. People with narcolepsy or idiopathic hypersomnia may join, including those who have not tried oxybate medicines before.
Irvine, CaliforniaAges 18–75
Idiopathic Hypersomnia trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting idiopathic hypersomnia studies listed above.
- Santa Ana, California · 2 studies
- Santa Monica Clinical Trials · 2 studies
- Alkermes Investigational Site
- Alkermes Investigator Site
- Amnova Clinical Research
- Long Beach Research Institute
- Long Beach, California
- Stanford Center for Sleep Medicine
What taking part in a idiopathic hypersomnia study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Idiopathic Hypersomnia trials in other states
Common questions
- Are there idiopathic hypersomnia clinical trials in California?
- Yes. We're currently tracking 8 recruiting idiopathic hypersomnia studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a idiopathic hypersomnia study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a idiopathic hypersomnia trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New idiopathic hypersomnia studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.