Clinical trials
Circadian Rhythm Disorders clinical trials
Below are recruiting circadian rhythm disorders clinical trials, each written for real people, not researchers. We’re tracking 53 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05866991Recruiting
Study tracking sleep and mood in depression
This study looks at people with a current episode of major depression and measures sleep and daily body-clock patterns, along with other mental health symptoms. They may help researchers better understand how sleep and mood changes relate, which could improve future care.
ParisAges Any age - NCT06192745Recruiting
Sleep and screen time study for kids 8 to 11
This study looks at how screen time in the evening affects sleep and body clocks in children. It may help families understand how to create healthier bedtime habits.
Houston, TexasAges 8–11 - NCT05446636Recruiting
Circadian rhythm study for pain after C-section
This study looks at whether your body’s daily rhythm (“circadian rhythm”) is linked to pain after an elective C-section using spinal anesthesia. If you join, you’ll be monitored after surgery to see whether timing or rhythm-related factors change your pain.
Chongqing, Chongqing MunicipalityAges 20–45 - NCT07744711Enrolling by invitation
Testing a light therapy app on an iPad
This study tests an iPad app that provides light therapy, which may help with conditions like seasonal depression or sleep problems. You will use the app for a period of time, and you may also choose to provide blood samples for a biomarker sub-study.
New York, New YorkAges 18 years+ - NCT06743373Recruiting
Cannabis and sleep in young adults
This study looks at how cannabis affects sleep, daily rhythms, and sensitivity to light in young adults. You would either stop using cannabis for 4 weeks (if you are a regular user) or serve as a non-user control, to compare sleep patterns.
Pittsburgh, PennsylvaniaAges 18–25 - NCT06104280Recruiting
How opioid addiction meds affect sleep and eyes
This study tests how three common medications for opioid use disorder (methadone, buprenorphine, and naltrexone) affect eye function, sleep, and daily body rhythms. It may help find ways to improve treatment for opioid addiction.
Birmingham, AlabamaAges 18–80 - NCT07294781Recruiting
Circadian rhythm study in healthy adults during wakefulness
This study explores how your internal body clock and sense of time change during 36 hours of staying awake. You will stay in a lab and complete simple tasks to help researchers understand the link between circadian rhythms and time perception.
AarhusAges 23–45 - NCT06544018Recruiting
Sleep and body clock study for CAPS patients and family members
This study looks at how CAPS (a genetic condition that causes inflammation) affects sleep and daily body rhythms. It compares people with CAPS to healthy family members living in the same home, to understand differences without any treatment being tested.
BronAges 6 years+ - NCT06296823Recruiting
Daily rhythms in healthy young adults
This study looks at how your body's daily rhythms (your internal clock) work by measuring natural chemicals in your body. It's for healthy people aged 17-35 who live at or above Denver's altitude.
Boulder, ColoradoAges 17–35 - NCT07329283Recruiting
Nighttime nutrition and sleep health study
This study looks at how eating at night affects your sleep and body clock. You will spend two nights in a sleep lab to test the effects of a small meal before bed.
Salt Lake City, UtahAges 18–35 - NCT05184933Recruiting
Study sleep timing and blood pressure patterns in adults
This study looks at how your sleep schedule and body clock relate to blood pressure control. You may be asked to follow a study plan that helps researchers understand what sleep and daily timing changes do to hypertension.
Portland, OregonAges 25–64 - NCT04743271Recruiting
Test how food timing affects the body’s daily rhythms
This study looks at how the timing of meals (and daily timing habits) affects your body’s natural clock and related health measures. It involves healthy, generally low-risk participants and may help researchers understand how timing affects metabolism and sleep.
Portland, OregonAges 18–40 - NCT07138313Recruiting
How diet affects sleep and daily rhythms
This study looks at how what you eat affects your sleep and daily rhythms. Healthy young adults aged 18-32 are invited to join to help researchers understand this connection.
UppsalaAges 18–32 - NCT05807178Recruiting
Light treatment to stabilize sleep-wake rhythm in ICU delirium
This trial tests whether controlled bright light in the ICU can improve confusion and the sleep-wake rhythm in adults who develop delirium. If it works, it may help patients become more clear-minded sooner while they recover in intensive care.
BerlinAges 18 years+ - NCT07292597Recruiting
Circadian timing and time perception study for healthy adults
This trial looks at how your internal body clock affects the way you perceive time. It may help you understand your own sleep patterns and daily rhythms better.
AarhusAges 23–45 - NCT07715721Recruiting
Acupuncture and Traditional Chinese Medicine for Sarcopenia and Sleep Problems in Older Adults
This study looks at how Traditional Chinese Medicine body types and sleep patterns relate to muscle loss (sarcopenia) in older adults, and tests whether acupoint stimulation (like acupuncture without needles) can help.
TainanAges 20 years+ - NCT07049783Recruiting
How exercise timing affects blood pressure response
This study looks at how the time of day you exercise affects your blood pressure response. It is for young adults with slightly elevated blood pressure who are generally healthy, not on certain medications, and do not have sleep or chronic health issues.
Newark, DelawareAges 18–39 - NCT07339592Enrolling by invitation
How meal timing affects sleep in medical residents
This study tests whether changing when and what you eat for two weeks can improve sleep quality and how your body's natural clock works. It is for medical residents in Jordan who do not have chronic health issues or sleep disorders.
AmmanAges 25 years+ - NCT04893226Recruiting
Time-restricted eating for postmenopausal metabolic risk
This trial studies whether limiting when you eat each day can improve blood sugar and other health markers in postmenopausal women with prediabetes or metabolic risk factors. It may help your body’s metabolism if your sleep and daily routine can stay fairly consistent.
Lexington, KentuckyAges 45–65 - NCT05829044Recruiting
How light exposure affects sleep and body clock by sex and age
This study looks at how non-visual light (light that isn’t just for seeing) affects your sleep timing and circadian rhythms, and whether the effects differ by sex and age. It may help researchers design better light-based or sleep-support strategies in the future.
Boston, MassachusettsAges 18–85 - NCT05336084Recruiting
Study how sleep timing affects mood and thinking in teens
This study looks at how your body clock and sleep “pressure” affect reward feelings and thinking control. It may help researchers understand teen sleep patterns and how they connect to brain and behavior.
Pittsburgh, PennsylvaniaAges 13–18 - NCT05977712Recruiting
Circadian rhythm factors in people with memory clinic concerns
This study looks at how daily body-clock timing (circadian rhythm) and other factors may relate to memory and thinking symptoms in memory clinic patients. You may be asked to wear a small device for about 9 days to track your daily patterns.
Paris, FranceAges 18 years+ - NCT06535178Recruiting
Sleep and heart health in fibromyalgia
This study looks at how sleep affects heart health in people with fibromyalgia (a condition causing widespread pain). Researchers will test if improving sleep can help your heart work better.
Portland, OregonAges 18–50 - NCT07685262Recruiting
Bright light therapy for better daytime function in students
This trial tests if morning bright light therapy can help university students feel more awake and function better during the day. You may be eligible if you live in shared student housing and don't have a diagnosed sleep problem.
Hung HomAges 18 years+
Hear when a new Circadian Rhythm Disorders trial opens
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Common questions
- Are there clinical trials for circadian rhythm disorders?
- Yes. Clin2 currently lists 53 recruiting circadian rhythm disorders studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a circadian rhythm disorders trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a circadian rhythm disorders trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
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.