Clinical trials
Placebo clinical trials
Below are recruiting placebo clinical trials, each written for real people, not researchers. We’re tracking 5,154 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04547439RecruitingPhase 2
Melatonin for diabetic eye disease and better sleep
This Phase 2 study tests whether melatonin can improve sleep and possibly outcomes related to diabetic retinopathy (damage to the retina from diabetes). It also checks whether it affects related symptoms while keeping people safe.
Chicago, IllinoisAges 40–65 - NCT04588285RecruitingPhase 2
Ambroxol for new and early dementia with Lewy bodies
This trial tests whether ambroxol (a mouth medicine) can help people with new or early dementia with Lewy bodies (DLB) or mild cognitive impairment linked to DLB. Participants take the medicine for about 18 months while the study tracks safety and changes over time.
Haugesund, HaugesundAges 50–85 - NCT04504123RecruitingPhase 2
Doxycycline eye treatment for persistent wet macular degeneration fluid
This trial tests whether an “MMP-9 inhibitor” medicine given as doxycycline (a tetracycline-type antibiotic) can reduce persistent leaking and fluid in wet age-related macular degeneration. It may help people whose wet AMD is not fully controlled even after several anti-VEGF injections.
Iowa City, IowaAges 50–99 - NCT04570085RecruitingPhase 3
Caffeine treatment to improve thinking in Alzheimer’s disease
This trial tests whether changing caffeine intake can improve thinking and brain function in people with Alzheimer’s disease. You may qualify if you can follow a low-caffeine diet and have stable Alzheimer’s treatment and sleep/heart conditions.
AmiensAges 50 years+ - NCT04550377RecruitingPhase 2
Cannabidiol for PTSD, including PTSD after mild head injury
This Phase 2 study tests whether cannabidiol (CBD) can reduce PTSD symptoms, including in people who also had a mild traumatic brain injury (TBI). It’s meant to see if CBD is helpful and safe for PTSD symptoms over the study period.
New York, New YorkAges 18–70 - NCT04509102Enrolling by invitationEarly Phase 1
Test added stimulant medicine with rTMS for depression
This early study tests whether adding a stimulant medicine to repetitive TMS (a non-drug brain stimulation) can improve depression. It is aimed at people whose depression has not improved after at least two antidepressant tries.
Los Angeles, CaliforniaAges 18–65 - NCT04588233Recruiting
Melatonin study for teens with sleep trouble
This study tests whether melatonin can help teens (ages 13–17) who have trouble sleeping. You may be able to join if you’ve never taken melatonin before and your sleep issue seems to be behavior-related rather than caused by another medical sleep problem.
Loma Linda, CaliforniaAges 13–17 - NCT04452500RecruitingPhase 2
Study drug for PTSD symptoms in Veterans
This trial tests a study medicine that blocks the effects of cortisol (a stress hormone) to reduce PTSD symptoms in Veterans. It’s meant for people with ongoing PTSD symptoms and stable treatments, and it closely checks safety because the medicine can affect sleep, mood, and heart rhythm.
Tuscaloosa, AlabamaAges 18–69 - NCT04419272RecruitingPhase 4
Methylphenidate for thinking problems in adults with focal seizures
This trial studies whether methylphenidate (a stimulant medicine) can improve thinking and memory problems related to epilepsy. You may be kept on your usual seizure medicines, and your thinking will be tested over about 16 weeks.
Miami, FloridaAges 18 years+ - NCT04482478Recruiting
Edl treatment trial for functional indigestion symptoms
This trial studies whether EDL medicine can improve symptoms of functional dyspepsia (indigestion) and is safe for people with this condition. You may be asked to complete symptom questionnaires and undergo stomach testing to confirm there is no other cause for your symptoms.
Seongnam-si, Gyeonggi-doAges 19 years+ - NCT04458545RecruitingPhase 1/Phase 2
Opioid vaccine study for adults with heroin or fentanyl use
This trial tests a vaccine made from parts designed to help the body respond to opioids (heroin or fentanyl). It is mainly for adults with moderate-to-severe opioid use disorder who are using opioids that match the study dosing needs and who are willing to do frequent visits over about a year.
Eatontown, New JerseyAges 18–59 - NCT04444440RecruitingPhase 4
Antibiotic prevention after bladder Botox for overactive bladder
This trial studies whether taking an antibiotic around the time of bladder Botox can lower the risk of urinary infections. It’s for women with overactive bladder who tried standard medicines but didn’t get enough relief.
Edmonton, AlbertaAges 18 years+ - NCT04421248RecruitingPhase 4
Testing blood or brain markers in kids with ADHD
This Phase 4 study checks whether certain markers change in the brain/body when children with ADHD take methylphenidate (a stimulant). It also compares these markers with healthy children to better understand ADHD.
Baltimore, MarylandAges 8–12 - NCT04380740RecruitingPhase 2
Longer vs shorter abatacept doses to prevent graft-versus-host disease
This trial tests whether giving abatacept for a longer or shorter time can better prevent graft-versus-host disease (a common complication after a stem cell transplant). If you’re having a planned unrelated donor transplant, the results may help reduce the risk or severity of transplant-related immune problems.
Duarte, CaliforniaAges 2 years+ - NCT04395196RecruitingPhase 2
Prenatal choline for pregnancy after alcohol exposure
This trial tests whether taking a choline supplement during pregnancy can reduce harmful effects on the baby when a person drinks heavily while pregnant. It may help support healthier pregnancy and baby outcomes for those who meet the study’s drinking and nutrition criteria.
Cape Town, Western CapeAges 18–45 - NCT04388124RecruitingPhase 2
Test drug to block endothelin for hard-to-control blood pressure
This Phase 2 trial tests whether blocking endothelin (using bosentan and related treatments) can improve blood pressure in people with resistant hypertension—high blood pressure that stays high despite multiple medicines. It may help if your blood pressure is still above target even with the right combination of therapy.
RouenAges 18–80 - NCT04432883Recruiting
Brain stimulation to improve speech after stroke aphasia
This trial tests whether targeted mild brain stimulation (tDCS) can improve speech therapy results for people with long-lasting (chronic) aphasia after a stroke. It may help strengthen naming and communication when added to standard speech-language treatment.
Albuquerque, New MexicoAges 25–85 - NCT04479072RecruitingPhase 4
Aspirin for preeclampsia during delivery
This trial tests whether taking aspirin during pregnancy around the time of delivery helps people with preeclampsia. You may be asked to take aspirin as part of a study plan, with monitoring to see how you do.
Chicago, IllinoisAges 18–45 - NCT04474847RecruitingPhase 3
Abatacept for giant cell arteritis treatment
This Phase 3 trial tests abatacept to treat giant cell arteritis (GCA), a blood vessel inflammation that can cause headaches and vision risk. It’s for people with newly diagnosed or returning (relapsing) GCA with active symptoms in the last 8 weeks.
Rochester, MinnesotaAges 50 years+ - NCT04383262RecruitingPhase 2
Fosamprenavir for reflux-related throat inflammation
This Phase 2 study tests whether fosamprenavir can reduce inflammation and enzyme activity in the throat area for people with laryngopharyngeal reflux (LPR). If you still have LPR symptoms despite 3 months of twice-daily reflux medicine, this trial may offer another treatment approach.
Milwaukee, WisconsinAges 18–64 - NCT04419584RecruitingPhase 2/Phase 3
Modified Qing-Ying decoction for children with eczema
This trial tests a traditional Chinese herbal formula (Modified Qing-Ying Decoction) for children ages 4 to 17 with moderate-to-severe eczema (atopic dermatitis). The study aims to see if this herbal treatment can improve skin dryness, redness, and itching, especially for those with dry, scaly patches.
Hong KongAges 4–17 - NCT04456816RecruitingPhase 2
Drug test for IgA? No—anti-PLA2R positive immune kidney disease
This Phase 2 trial studies AP1189 in people with a specific immune-related kidney disease called iMN and very high urine protein. It aims to see whether the drug is safe and tolerable and if it can reduce protein in the urine.
AarhusAges 18–85 - NCT04484025Enrolling by invitationPhase 2
Study of an oral drug for hospitalized COVID-19 patients
This trial tests an oral drug called SPI-1005 for people hospitalized with moderate COVID-19. The drug may help reduce inflammation and protect the lungs, and the study will compare it to a placebo (a pill with no active medicine) to see if it helps people recover.
New Haven, ConnecticutAges 18 years+ - NCT04462770RecruitingPhase 3
Clemizole trial for children and adults with Dravet syndrome
This Phase 3 study tests EPX-100 (clemizole) to help reduce seizures in people with Dravet syndrome whose seizures are not fully controlled by current anti-seizure medicines. You may consider this study if your Dravet diagnosis is confirmed and your medical situation fits the specific rules about medicines and seizure causes.
Birmingham, AlabamaAges 2 years+
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Common questions
- Are there clinical trials for placebo?
- Yes. Clin2 currently lists 5,154 recruiting placebo 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 placebo 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 placebo 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.