Skip to content

Tachyphylaxis, Tolerance, & Withdrawal Post Treatment With Igalmi for Agitation in Schizophrenia or Bipolar Disorder

Characterization of Tachyphylaxis, Tolerance, and Withdrawal After Discontinuation of Igalmi in Frequently Agitated Schizophrenic or Bipolar Patients After 7 Days of PRN Treatment

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06041646
Enrollment
29
Registered
2023-09-18
Start date
2023-10-02
Completion date
2024-04-29
Last updated
2026-08-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Agitation,Psychomotor, Bipolar Disorder, Schizo Affective Disorder, Schizophrenia, Schizophreniform Disorders

Keywords

Agitation, Schizophrenia, Bipolar, Dexmedetomidine, tachyphylaxis, tolerance, withdrawal, PRN treatment, Open-Label, PEC, CGI, ACES, Safety, Tolerability, Igalmi

Brief summary

This is an in-clinic, single arm, open-label study assessing tachyphylaxis, tolerance, and withdrawal following repeated doses of Igalmi in adult males and females with agitation associated with schizophrenia or bipolar disorder.

Detailed description

This is an in-clinic, single arm, open-label study assessing tachyphylaxis, tolerance, and withdrawal following repeated doses of Igalmi in adult males and females (18 to 65 years old, inclusive) with agitation associated with schizophrenia or bipolar disorder. Subjects will be screened for eligibility within 15 days of first dose and no study procedures will occur unless subjects provide written informed consent. Subjects will receive single doses of 180 μg of Igalmi as needed for the treatment of agitation over a period of 7 days followed by a 3- day follow-up period during which time no Igalmi will be administered in an effort to characterize any potential withdrawal. Subjects will sublingually self-administer Igalmi for an agitation episode that reaches a pre-dose PEC total score of 14 or greater, as determined by a trained rater. Safety assessments will be conducted before and after each dose. If the subject's agitation is recurrent or persistent, repeat doses of 90 µg may be administered (no more than 2 repeat doses within a 24-hour period) in the absence of any safety concerns or adverse events.

Interventions

DRUGSublingual film containing Igalmi

Sublingual film containing 180 µg of Igalmi (dexmedetomidine)

Sponsors

BioXcel Therapeutics Inc
Lead SponsorINDUSTRY
Lotus Clinical Research, LLC
CollaboratorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Open-Label

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

1. Male and female subjects between the ages of 18 to 65 years, inclusive. 2. Subjects who have met DSM-5 criteria for schizophrenia, schizoaffective, or schizophreniform disorder or bipolar I or II disorder. 3. Subjects who are currently moderate to severely agitated at least 3 days a week. 4. Subjects who read, understand, and provide written informed consent. 5. Subjects who are in good general health prior to study participation as determined by a detailed medical history and in the opinion of the Principal Investigator. 6. Subjects who agree to use a medically acceptable and effective birth control method 7. Subjects must be willing to remain in-clinic for the duration of the study.

Exclusion criteria

1. Subjects with agitation caused by acute intoxication, including positive identification of alcohol by breathalyzer or drugs of abuse during screening. 2. Use of benzodiazepines or other hypnotics or antipsychotic drugs in the 6 hours before study treatment. 3. Subjects with congenital prolonged QT syndrome. 4. Prior treatment with Igalmi

Design outcomes

Primary

MeasureTime frameDescription
Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreBaseline and 2 hours post-dose for all doses administered over 7 days.The Positive and Negative Syndrome Scale-Excited Component (PEC) includes 5 items-poor impulse control, tension, hostility, uncooperativeness, and excitement-each of which is rated from 1 (minimum) to 7 (maximum); the sum of these 5 items, the PEC total score, ranges from 5 (absence of agitation) to 35 (extremely severe).
Clinical Global Impression - Improvement (CGI-I)2 hours post-dose for all doses administered over 7 days.The Clinical Global Impression - Improvement (CGI-I) for agitation in response to treatment measures the current level of agitation relative to the level of agitation prior to administration of study intervention. The CGI-I scores range from 1 to 7 with a score of 1 indicating very much improved, and a score of 7 indicating very much worse.

Secondary

MeasureTime frameDescription
Number of Participants With Adverse Events During the Follow-up PeriodDay 8 through Day 10Evaluation of withdrawal phenomenon based on the occurrence of adverse events such as tachycardia, systolic hypertension, nausea, or vomiting and the emergence of any new adverse events on ≥2 consecutive days of the 3-day off-treatment follow-up period.

Countries

United States

Contacts

STUDY_CHAIRBioXcel MM, MD

BioXcel Therapeutics

Participant flow

Recruitment details

The study was conducted in the United States from 02Oct2023 to 29Apr2024.

Participants by arm

ArmCount
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)
An initial dose of 180 µg of Igalmi as needed for the treatment of agitation over a period of 7 days. In the event of persistent or recurrent agitation, investigators may choose to repeat dose at 90 μg after the 2-hour time point in the absence of dose-limiting adverse events or safety concerns. A maximum of 2 repeat doses will be allowed in a 24-hour period. Sublingual film containing Igalmi: Sublingual film containing 180 µg of Igalmi (dexmedetomidine)
29
Total29

Baseline characteristics

CharacteristicActive Treatment - 180 mcg of Igalmi (Dexmedetomidine)
Age, Continuous45.4 years
STANDARD_DEVIATION 8.85
Diagnosis
Bipolar 1 or 2
17 Participants
Diagnosis
Schizoaffective disorder
2 Participants
Diagnosis
Schizophrenia
10 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
28 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
13 Participants
Race (NIH/OMB)
More than one race
1 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
15 Participants
Sex: Female, Male
Female
10 Participants
Sex: Female, Male
Male
19 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 28
other
Total, other adverse events
14 / 28
serious
Total, serious adverse events
0 / 28

Outcome results

Primary

Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total Score

The Positive and Negative Syndrome Scale-Excited Component (PEC) includes 5 items-poor impulse control, tension, hostility, uncooperativeness, and excitement-each of which is rated from 1 (minimum) to 7 (maximum); the sum of these 5 items, the PEC total score, ranges from 5 (absence of agitation) to 35 (extremely severe).

Time frame: Baseline and 2 hours post-dose for all doses administered over 7 days.

Population: For each dose the population consists only of patients who took that dose.

ArmMeasureGroupValue (MEAN)Dispersion
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 1-10.4 score on a scaleStandard Deviation 2.94
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 2-10.0 score on a scaleStandard Deviation 3.54
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 3-10.1 score on a scaleStandard Deviation 3.6
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 4-9.8 score on a scaleStandard Deviation 2.55
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 5-11.5 score on a scaleStandard Deviation 4.51
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 6-8.7 score on a scaleStandard Deviation 3.79
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Change From Baseline in the Positive and Negative Syndrome Scale- Excited Component (PEC) Total ScoreDose 7-11.0 score on a scale
Primary

Clinical Global Impression - Improvement (CGI-I)

The Clinical Global Impression - Improvement (CGI-I) for agitation in response to treatment measures the current level of agitation relative to the level of agitation prior to administration of study intervention. The CGI-I scores range from 1 to 7 with a score of 1 indicating very much improved, and a score of 7 indicating very much worse.

Time frame: 2 hours post-dose for all doses administered over 7 days.

Population: For each dose only the patients who took that dose are included.

ArmMeasureGroupValue (MEAN)Dispersion
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 72.0 score on a scale
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 11.2 score on a scaleStandard Deviation 0.5
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 21.2 score on a scaleStandard Deviation 0.39
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 31.3 score on a scaleStandard Deviation 0.47
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 41.0 score on a scaleStandard Deviation 0
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 51.2 score on a scaleStandard Deviation 0.41
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Clinical Global Impression - Improvement (CGI-I)Dose 61.3 score on a scaleStandard Deviation 0.58
Secondary

Number of Participants With Adverse Events During the Follow-up Period

Evaluation of withdrawal phenomenon based on the occurrence of adverse events such as tachycardia, systolic hypertension, nausea, or vomiting and the emergence of any new adverse events on ≥2 consecutive days of the 3-day off-treatment follow-up period.

Time frame: Day 8 through Day 10

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Active Treatment - 180 mcg of Igalmi (Dexmedetomidine)Number of Participants With Adverse Events During the Follow-up Period0 Participants

Source: ClinicalTrials.gov · Data processed: Aug 12, 2026