NCT06656416 · Alto Neuroscience
ALTO-100 in Bipolar Disorder With Depression (BD-D)
What this study is about
The purpose of this study is to assess antidepressant effectiveness differences between ALTO-100 and placebo during the where neither patients nor doctors know which treatment is given period in patients with bipolar disorder I or II with current major depressive episode, when used adjunctively to a mood stabilizer and/or atypical antipsychotic, related to patient characteristics.
View original scientific description
The purpose of this study is to assess antidepressant efficacy differences between ALTO-100 and placebo during the Double-Blind period in patients with bipolar disorder I or II with current major depressive episode, when used adjunctively to a mood stabilizer and/or atypical antipsychotic, related to patient characteristics. Additionally, safety, tolerability, and efficacy will be assessed in a subsequent open label treatment period.
Interventions
DRUG
ALTO-100
ALTO-100 40 mg tablet BID
DRUG
Placebo
Placebo tablet BID
Primary outcome measures
To assess efficacy of ALTO-100 versus placebo on depression symptoms in bipolar disorder in a pre-defined subgroup of participants as measured by the mean change from Day 1 to Week 6 on the Montgomery-Åsberg Depression Rating Scale (MADRS) total score
Time frame: Change assessed from Day 1 to Week 6
MADRS is a clinician-administered scale designed to measure depression severity and detects changes due to antidepressant treatment. The MADRS evaluates the following 10 items: apparent sadness, reported sadness, inner tension, reduced sleep, reduced appetite, concentration difficulties, lassitude, inability to feel, pessimistic thoughts, and suicidal thoughts. Each item is scored from 0 (item not present or normal) to 6 (severe or continuous presence of the symptoms), for a total possible score of 60. Higher scores represent a more severe condition.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Have a diagnosis of BD-I or BD-II as well as BD-D
- At baseline, taking a mood stabilizer, lithium (LI) or lamotrigine (LMG) or valproic acid (VPA, any form) or combination of Li + LMG or Li + VPA and/or taking an approved atypical antipsychotic medication (olanzapine, quetiapine, lurasidone, risperidone, ziprasidone, cariprazine, aripiprazole, lumateperone, and asenapine) for at least 6 weeks with no dose modifications in the past 2 weeks
- Willing to comply with all study assessments and procedures
- Must not be pregnant or breastfeeding at time of enrollment or throughout study
Exclusion criteria
- Evidence of unstable medical condition
- Concurrent use of any prohibited medications or substance use disorder
- Diagnosed psychotic disorder (other than mania or depression)
- Current moderate or severe substance use disorder
- Has a history of hypersensitivity or allergic reaction to ALTO-100 or any of its components/excipients
- Concurrent or recent participa
Where
- Chandler, Arizona
- Phoenix, Arizona
- Yuma, Arizona
- Fayetteville, Arkansas
- Little Rock, Arkansas
- Imperial, California
- Los Angeles, California
- Mather, California
- Oceanside, California
- Riverside, California
- Colorado Springs, Colorado
- Lauderhill, Florida
And 13 more locations — see the full list below.
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jul 16, 2025 · Source of record for eligibility and locations