Clinical Trial Results:
A Phase 2 Open-Label Proof of Concept Study to Assess the Efficacy, Safety, and Pharmacokinetics of ACH-0144471 in Untreated Patients With Paroxysmal Nocturnal Hemoglobinuria
Summary
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EudraCT number |
2016-002652-25 |
Trial protocol |
GB IT |
Global end of trial date |
14 Nov 2018
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Results information
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Results version number |
v3(current) |
This version publication date |
23 Jul 2022
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First version publication date |
23 May 2021
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Other versions |
v1 , v2 |
Version creation reason |
Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
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Trial identification
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Sponsor protocol code |
ACH471-100
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT03053102 | ||
WHO universal trial number (UTN) |
U1111-1190-3490 | ||
Sponsors
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Sponsor organisation name |
Alexion Pharmaceuticals, Inc.
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Sponsor organisation address |
121 Seaport Boulevard, Boston, MA, United States, 02210
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Public contact |
European Clinical Trial Information, Alexion Pharmaceuticals, Inc., +33 787-148-158, clinicaltrials.eu@alexion.com
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Scientific contact |
European Clinical Trial Information, Alexion Pharmaceuticals, Inc., +33 787-148-158, clinicaltrials.eu@alexion.com
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Paediatric regulatory details
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Is trial part of an agreed paediatric investigation plan (PIP) |
No
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Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Results analysis stage
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Analysis stage |
Final
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Date of interim/final analysis |
30 Oct 2019
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Is this the analysis of the primary completion data? |
Yes
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Primary completion date |
14 Nov 2018
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Global end of trial reached? |
Yes
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Global end of trial date |
14 Nov 2018
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Was the trial ended prematurely? |
No
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General information about the trial
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Main objective of the trial |
To determine the safety and efficacy of ACH-0144471 (danicopan) in currently untreated participants with paroxysmal nocturnal hemoglobinuria. After 12 weeks of treatment, participants deriving clinical benefit were offered enrollment in a separate long-term extension study (ACH471-103, 2017-000665-79).
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Protection of trial subjects |
The study was conducted in accordance with the ethical principles outlined in the 2013 (Fortaleza, Brazil) revision of the 1964 Declaration of Helsinki, Good Clinical Practice (GCP) as required by the International Council of Harmonisation (ICH) guidelines, applicable regional and local laws legislation in the USA, and standard operating procedures (SOPs) in place.
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Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
31 Mar 2017
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Long term follow-up planned |
Yes
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Long term follow-up rationale |
Safety, Efficacy | ||
Long term follow-up duration |
4 Years | ||
Independent data monitoring committee (IDMC) involvement? |
No
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Population of trial subjects
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Number of subjects enrolled per country |
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Country: Number of subjects enrolled |
United Kingdom: 1
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Country: Number of subjects enrolled |
Italy: 2
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Country: Number of subjects enrolled |
New Zealand: 6
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Country: Number of subjects enrolled |
Korea, Democratic People's Republic of: 1
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Worldwide total number of subjects |
10
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EEA total number of subjects |
2
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Number of subjects enrolled per age group |
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In utero |
0
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Preterm newborn - gestational age < 37 wk |
0
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Newborns (0-27 days) |
0
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Infants and toddlers (28 days-23 months) |
0
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Children (2-11 years) |
0
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Adolescents (12-17 years) |
1
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Adults (18-64 years) |
9
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From 65 to 84 years |
0
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85 years and over |
0
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Recruitment
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Recruitment details |
Participants were evaluated for eligibility. A window of up to 60 days was permitted to allow screening followed by any required vaccinations. | ||||||||||||
Pre-assignment
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Screening details |
In Part 1, participants received danicopan (100 or 150 mg TID) for 28 days. A dose increase up to 175 mg TID (N=8 participants) and 200 mg TID (N=4 participants) was conducted. Participants with reductions in lactate dehydrogenase (LDH) meeting specified criteria were offered continued dosing beyond Day 28, up to 8 additional weeks (Part 2). | ||||||||||||
Period 1
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Period 1 title |
Study Part 1: 28-Day Treatment
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Is this the baseline period? |
Yes | ||||||||||||
Allocation method |
Not applicable
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Blinding used |
Not blinded | ||||||||||||
Arms
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Arm title
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Danicopan | ||||||||||||
Arm description |
Participants received danicopan 100 to 200 milligrams (mg) three times per day (TID). | ||||||||||||
Arm type |
Experimental | ||||||||||||
Investigational medicinal product name |
Danicopan
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Investigational medicinal product code |
ACH-0144471
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Other name |
ACH-4471, ACH4471, 4471, ALXN2040
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
In Part 1, participants received danicopan for 28 days. Starting doses were 100 or 150 mg TID. A further dose increase up to 175 mg TID (N=8 participants) and 200 mg TID (N=4 participants) was conducted.
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Period 2
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Period 2 title |
Study Part 2: 84-Day Treatment
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Is this the baseline period? |
No | ||||||||||||
Allocation method |
Not applicable
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Blinding used |
Not blinded | ||||||||||||
Arms
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Arm title
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Danicopan | ||||||||||||
Arm description |
Participants received danicopan 100 to 200 mg TID. | ||||||||||||
Arm type |
Experimental | ||||||||||||
Investigational medicinal product name |
Danicopan
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Investigational medicinal product code |
ACH-0144471
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Other name |
ACH-4471, ACH4471, 4471, ALXN2040
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
Participants with reductions in LDH meeting specified criteria in Part 1 were offered continued dosing beyond Day 28, for up to 8 additional weeks in Part 2. After 12 weeks of treatment, participants deriving clinical benefit were offered enrollment in a separate long-term extension study (ACH471-103, 2017-000665-79).
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Baseline characteristics reporting groups
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Reporting group title |
Study Part 1: 28-Day Treatment
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Reporting group description |
Participants received danicopan 100 to 200 mg TID. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
Danicopan
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Reporting group description |
Participants received danicopan 100 to 200 milligrams (mg) three times per day (TID). | ||
Reporting group title |
Danicopan
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Reporting group description |
Participants received danicopan 100 to 200 mg TID. | ||
Subject analysis set title |
Danicopan
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Subject analysis set type |
Full analysis | ||
Subject analysis set description |
All participants who received at least 1 dose of study drug and had analysable data at the timepoints specified.
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End point title |
Change From Baseline In Serum LDH Levels At Day 28 [1] | ||||||||||||||
End point description |
Change from Baseline = Serum LDH levels on Day 28 - Baseline Serum LDH levels.
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End point type |
Primary
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End point timeframe |
Baseline, Day 28
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Notes [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point. Justification: Only descriptive analysis was planned to be reported for this endpoint. |
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No statistical analyses for this end point |
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End point title |
Change From Baseline In Hemoglobin (Hgb) At Days 28 And 84 | ||||||||||||||||||
End point description |
Change from Baseline = Hgb levels on Days 28 or 84 - Baseline Hgb levels.
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End point type |
Secondary
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End point timeframe |
Baseline, Days 28 and 84
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No statistical analyses for this end point |
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End point title |
Change From Baseline In Serum LDH Levels At Day 84 | ||||||||||||||
End point description |
Change from Baseline = Serum LDH levels on Day 84 - Baseline Serum LDH levels. All participants who received at least 1 dose of study drug and had analyzable data at the timepoints specified.
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End point type |
Secondary
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End point timeframe |
Baseline, Day 84
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No statistical analyses for this end point |
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End point title |
Paroxysmal Nocturnal Hemoglobinuria (PNH) Type III Red Blood Cell (RBC) Clone Size | ||||||||||||||
End point description |
PNH RBC, summed type III, clone size levels were assessed from Baseline to Day 28 and Day 84. The PNH clone size refers to the percentage of PNH-affected cells versus normal cells within the total cell population. All participants who received at least 1 dose of study drug and had analyzable data at the timepoints specified.
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End point type |
Secondary
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End point timeframe |
Baseline, Day 28, and Day 84
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No statistical analyses for this end point |
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End point title |
Serious Adverse Events (SAEs), Grade 3 And Grade 4 Treatment-emergent Adverse Events (TEAEs), And Adverse Events (AEs) Leading To Discontinuation | ||||||||||||||
End point description |
An AE was as any untoward medical occurrence associated with the use of a drug in humans, whether or not considered drug related. An SAE was an AE that met at least 1 of the following criteria: resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization for the AE, persistent or significant disability/incapacity or substantial disruption of the ability to conduct normal life functions, congenital anomaly/birth defect (in the child of a participant who was exposed to the study drug), important medical event or reaction. The intensity of an AE was graded according to the Common Terminology Criteria for Adverse Events (CTCAE) Adverse Event Severity Grading Table. A summary of SAEs and other non-serious AEs regardless of causality is located in the Adverse Events section.
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End point type |
Secondary
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End point timeframe |
After the first dose of study medication (Day 1) through 14 days after the last dose of study drug (up to Day 104)
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No statistical analyses for this end point |
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End point title |
Grade 3 And Grade 4 Laboratory Abnormalities | ||||||||||||||||
End point description |
Laboratory abnormalities were determined from laboratory measurements analyzed at the central or local laboratories, and were graded using CTCAE.
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End point type |
Secondary
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End point timeframe |
After the first dose of study medication (Day 1) through 14 days after the last dose of study drug (up to Day 104).
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No statistical analyses for this end point |
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End point title |
Pharmacokinetics (PK): Area Under The Plasma Concentration-time Curve From Time Of Administration To 8 Hours Post-dose (AUC0-8) | ||||||||||||||
End point description |
Serial blood samples were collected predose and up to 8 hours postdose.
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End point type |
Secondary
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End point timeframe |
Days 6 and 20
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No statistical analyses for this end point |
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End point title |
PK: Maximum Plasma Concentration (Cmax) | ||||||||||||||
End point description |
Serial blood samples were collected predose and up to 12 hours postdose.
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End point type |
Secondary
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End point timeframe |
Days 6 and 20
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No statistical analyses for this end point |
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End point title |
PK: Time To Maximum Concentration (Tmax) | ||||||||||||||
End point description |
Serial blood samples were collected predose and up to 12 hours postdose.
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End point type |
Secondary
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End point timeframe |
Days 6 and 20
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No statistical analyses for this end point |
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End point title |
Complement Alternative Pathway (AP) Functional Activity | ||||||||||||
End point description |
Serum AP functional activity was measured by the Wieslab functional immunoassay method.
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End point type |
Secondary
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End point timeframe |
Baseline and Day 28
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No statistical analyses for this end point |
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End point title |
Complement Bb | ||||||||||||
End point description |
Plasma Bb was measured by enzyme-linked immunosorbent assay (ELISA).
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End point type |
Secondary
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End point timeframe |
Baseline and Day 28
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No statistical analyses for this end point |
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Adverse events information
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Timeframe for reporting adverse events |
After the first dose of study medication (Day 1) through 14 days after the last dose of study drug (up to Day 104).
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Assessment type |
Systematic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
MedDRA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
18.1
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Reporting groups
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Reporting group title |
Danicopan
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Reporting group description |
Participants received danicopan 100 to 200 mg TID. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Frequency threshold for reporting non-serious adverse events: 0% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Substantial protocol amendments (globally) |
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Were there any global substantial amendments to the protocol? Yes | |||
Date |
Amendment |
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07 Mar 2017 |
• Updated the dose levels based on the current PK modelling and clinical safety in healthy volunteers • Reworded the primary objective for clarity • Updated the previous human experience • Addressed discrepancies between this protocol and the ACH471-102 screening protocol |
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19 Apr 2017 |
• Upgraded the AE grading criteria used in the study to CTCAE and clarified language around the classification of AEs • Updated the previous human experience • Clarified the collection of information about red blood cell transfusions at each visit |
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18 May 2017 |
• Increased the starting dose from 100 mg TID (per the original protocol) to 150 mg TID • Increased the maximum permitted dose to 200 mg TID • Allowed vaccination concurrent with dosing, if local practice dictated |
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05 Dec 2017 |
• Updated the contraception section to include definitions requested by Health Authorities • Updated the contact information for SAE reporting • Added wording to permit the conducting of patient-reported outcomes interviews as questionnaires, where required |
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21 Dec 2017 |
• Increased the maximum permitted dose from 200 mg TID (Amendment 3) to 250 mg TID • Updated the contact information for SAE reporting |
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13 Mar 2018 |
• Specified that vaccination against bacterial infections should be performed, when necessary, based on vaccination history • Updated and clarified requirements for “acceptable” and “highly effecting” methods of contraception |
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Interruptions (globally) |
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Were there any global interruptions to the trial? No | |||
Limitations and caveats |
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Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
None reported | |||
Online references |
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http://www.ncbi.nlm.nih.gov/pubmed/33121236 |