A Phase 2 interventional study of IGC-AD1-Active and IGC-AD1-Placebo in Alzheimer Disease, Agitation,Psychomotor and Care Giving Burden, sponsored by IGC Pharma, LLC. Active, not recruiting at 28 sites in 3 countries. Open to participants aged 60 Years and older. Per ClinicalTrials.gov, last updated 2026-09-30.
Sponsored by IGC Pharma, LLC · Phase 2, Interventional, and Treatment
The purpose of this study is to assess the efficacy of the oral medication IGC-AD1, a THC-based (Delta-9-Tetrahydrocannabinol) formulation administered twice a day on Agitation in patients with mild to severe dementia from Alzheimer's.
CALMA is a multi-center, double-blind, randomized, placebo-controlled clinical trial. The study targets participants aged 60 and older with mild to severe Alzheimer's dementia who have exhibited clinically significant agitation for at least two weeks prior to enrollment. Agitation caused by other conditions or transient symptoms must be ruled out. Eligibility is determined by a baseline Neuropsychiatric Inventory (NPI-12), Agitation subscale score of ≥4 and the International Psychogeriatric Association (IPA) criteria for agitation.
The investigational medication is an oral solution containing two active ingredients: delta-9 tetrahydrocannabinol (THC) and melatonin. The treatment is administered for 42 days, followed by a two-day taper period at the end of the study.
Safety oversight includes daily calls on days 2, 3, and 4, transitioning to calls every third day thereafter. These calls will review study partners logbook entries, changes in concomitant medications, and adverse events.
The primary objective of the study is to evaluate the efficacy of IGC-AD1 on agitation, measured by changes in the Cohen-Mansfield Agitation Inventory (CMAI) scores from baseline to the End of treatment (EOT). The secondary objective is to assess efficacy by examining CMAI score changes from baseline to week two. Additionally, exploratory objectives are outlined in separate documentation.
Blood samples will be collected during the trial for sparse pharmacokinetic (PK) analysis, blood-based CNS biomarker, and genotyping.
3,965 studies on the registry are indexed under Alzheimer Disease; 926 are open to participants now.
This study's planned enrollment of 164 is above the median of 70 across 3,019 interventional studies indexed under Alzheimer Disease.
Browse Alzheimer Disease studies →IGC Pharma, LLC is the lead sponsor of 2 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
To be eligible to participate in this study, the participant must meet all the following criteria:
Inclusion Criteria
Agitation assessed by:
An individual who meets any of the following criteria will be excluded from participation in this study:
Exclusion Criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Postmenopausal
Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
IGC-AD1-Active, oral solution with two APIs (THC and melatonin).
Drug: IGC-AD1-Active
IGC-AD1-Placebo, oral solution similar to Active in color, taste, and texture, with excipients but without APIs.
Drug: IGC-AD1-Placebo
A non-sterile solution for oral administration.
Also known as: Active
A non-sterile solution for oral administration similar in color and texture to the Active.
Also known as: Placebo
Agitation
Change in mean Cohen Mansfield Agitation Inventory (CMAI) score
Time frame: Baseline to week six
Acute Agitation
Change in mean Cohen Mansfield Agitation Inventory (CMAI) score
Time frame: Baseline to week two
Agitation at week four
Change in mean Cohen Mansfield Agitation Inventory (CMAI) score
Time frame: Baseline to week four
Participant overall wellbeing
Change in the Clinical Global Impression Scale (CGI)
Time frame: Baseline to weeks two and six
Participant executive functions
Change in Mini-Mental State Examination (MMSE2) score
Time frame: Baseline to week six
Depression
Change in mean Cornell Scale for Depression in Dementia (CSDD) score
Time frame: Baseline to weeks two, four, and six
Neuropsychiatric symptoms
Change in mean Neuropsychiatric Inventory (NPI-12) score
Time frame: Baseline to weeks two, four, and six
Participant quality of life
Change in mean Quality of Life in Alzheimer's Disease (QOL-AD) score
Time frame: Baseline to weeks two, four and six
Caregiver burden
Change in mean Zarit Burden Interview (ZBI) score
Time frame: Baseline to weeks two and six
Psychotropic drugs
Change in type and dosage of psychotropic drugs
Time frame: Baseline to six weeks
CYP2C9 polymorphisms on agitation
Change in mean Cohen Mansfield Agitation Inventory (CMAI) score for each type of metabolizer group (\*1/\*1, \*1/\*3, etc.)
Time frame: Baseline to weeks two, four and six
Plan to share: No
No publications or documents are linked to this record.
Started Oct 2022 (actual). Primary completion is estimated for Nov 2026, 49 months after the start.
Of 130 industry-sponsored phase 2 interventional studies under Alzheimer Disease, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 39. This study's planned 49 months is above that.
Counting every sponsor, half of 257 studies reached it within 37 months; a quarter within 21 and three quarters within 58.
Since we started tracking on Sep 25, 2026, the dates moved once, on Sep 30, 2026: primary completion Aug 2026 → Nov 2026 and completion Aug 2026 → Nov 2026.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is active, not recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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IGC Pharma, LLC