Clinical trials · California
Narcolepsy clinical trials in California
We’re tracking 14 recruiting narcolepsy studies with a site in California — including Phase 2, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06767683RecruitingPhase 2/Phase 3
Long-term study of ALKS 2680 for narcolepsy and idiopathic hypersomnia
This study is for people with narcolepsy or idiopathic hypersomnia who have already taken part in an earlier ALKS 2680 study. It aims to see how well the medication works and how safe it is when taken for a longer time.
Los Angeles, CaliforniaAges 18–70 - NCT07363720RecruitingPhase 3
A study of TAK-861 for narcolepsy with cataplexy
This trial tests a new medication called TAK-861 for people with narcolepsy type 1 (NT1), which causes sudden muscle weakness (cataplexy) and extreme daytime sleepiness. The study aims to see if TAK-861 can help reduce these symptoms.
Redwood City, CaliforniaAges 16–70 - 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 - 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 - NCT07633301RecruitingPhase 2
TAK-360 Study for Adults With Narcolepsy Type 1
This study tests a new medication called TAK-360 to help adults with narcolepsy type 1 (a condition that causes extreme daytime sleepiness and sudden muscle weakness called cataplexy) feel more alert during the day. The goal is to see if this treatment is safe and effective for managing narcolepsy symptoms.
Redwood City, CaliforniaAges 18–70 - 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.
Los Angeles, CaliforniaAges 18–75 - NCT07675135RecruitingPhase 3
Testing a new narcolepsy drug for excessive daytime sleepiness
This study tests a new medicine, HBS-301, for people with narcolepsy type 1 or type 2 who still have excessive daytime sleepiness. If you take other medications for sleepiness or mood, they must be stable for at least 3 months, and you cannot take some as-needed sleepiness medicines.
Lancaster, CaliforniaAges 18 years+ - NCT07502443RecruitingPhase 3
Study of ALKS 2680 for narcolepsy type 2
This study tests an investigational drug called ALKS 2680 for people with narcolepsy type 2, a condition that causes excessive daytime sleepiness without sudden muscle weakness. The goal is to see if the drug is safe and helps reduce daytime sleepiness.
Los Angeles, CaliforniaAges 18–70 - NCT07455383RecruitingPhase 3
Testing ALKS 2680 for adults with narcolepsy type 1
This study tests a new medication, ALKS 2680, to see if it helps reduce daytime sleepiness and other symptoms in adults with narcolepsy type 1. It may offer a new treatment option for people with this condition.
Los Angeles, CaliforniaAges 18–70 - NCT06952699RecruitingPhase 2
TAK-360 for narcolepsy type 2
This study tests a new medicine called TAK-360 for people with narcolepsy type 2 (narcolepsy without cataplexy). It aims to see if the drug safely reduces daytime sleepiness.
Chula Vista, CaliforniaAges 18–70 - NCT04899947Recruiting
Registry for children with narcolepsy
This trial is a registry (a study database) that collects information from children and teens with narcolepsy. It helps researchers better understand the condition and who is affected, which can support future studies.
San Diego, CaliforniaAges Up to 17 years - NCT07493265RecruitingPhase 2
Study of E2086 for adults with narcolepsy
This study tests a new drug called E2086 to see if it can help reduce daytime sleepiness and sudden muscle weakness in adults with narcolepsy. It involves two groups: people with cataplexy (type 1) and those without (type 2).
Santa Ana, CaliforniaAges 18 years+ - NCT05816382RecruitingPhase 2/Phase 3
Testing TAK-861 for narcolepsy type 1 sleepiness
This Phase 2/3 study tests TAK-861 in people with narcolepsy type 1 (NT1) who already completed an earlier TAK-861 trial. The goal is to see if the medicine remains safe and effective for ongoing central (brain-related) sleepiness problems.
Santa Ana, CaliforniaAges 16–70 - NCT06809803RecruitingPhase 2
Extended-release sodium oxybate for children with narcolepsy
This trial tests an extended-release medicine (sodium oxybate) to see if it helps children with narcolepsy type 1 feel less sleepy during the day. It is only for children who are seen at the Stanford Sleep Clinic and have a clear diagnosis.
Redwood City, CaliforniaAges 7–17
Where these studies are running in California
Institutions with a site for the recruiting narcolepsy studies listed above.
- Alkermes Investigational Site · 3 studies
- Santa Ana, California · 2 studies
- Santa Monica Clinical Trials · 2 studies
- SDS Clinical Trials, Inc · 2 studies
- Stanford Center for Sleep Sciences and Medicine · 2 studies
- Stanford University · 2 studies
- Alkermes Investigator Site
- Long Beach, California
What taking part in a narcolepsy 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.
Narcolepsy trials in other states
Common questions
- Are there narcolepsy clinical trials in California?
- Yes. We're currently tracking 14 recruiting narcolepsy 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 narcolepsy 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 narcolepsy 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 narcolepsy 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.