Recent Updates
Recently added Catalysts

KVD900

Phase 3

Hereditary Angioedema | Small molecule | Other |KalVista Pharmaceuticals, Inc.|Last Updated: Jun 8, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindCONTROLLEDBiomarker
Total Trials6
Total Enrollment496
FDA Designations
No designations recorded
Clinical Trials (6)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06467084Open-Label Safety, PK, and Efficacy Trial of Sebetralstat (KVD900) in Pediatric Patients (Ages 2-11) With HAE Type I or IIPHASE3 COMPLETED 36Jun 24, 2024Jan 15, 2026Jan 23, 202624 United States, Canada +5
NCT05505916An Open-label Extension Trial to Evaluate the Long-term Safety of KVD900 (Sebetralstat) for On-Demand Treatment of Angioedema Attacks in Adolescent and Adult Patients With Hereditary Angioedema (HAE)PHASE3 COMPLETED 145Oct 24, 2022May 27, 2026Jun 5, 202671 United States, Australia +21
NCT05511922PK Subtrial in Adolescent Patients With HAE Type I or II Participating in the KVD900-302 TrialPHASE3 COMPLETED 11Oct 24, 2022May 27, 2026Jun 8, 202661 United States, Australia +15
NCT05259917A Phase III, Crossover Trial Evaluating the Efficacy and Safety of KVD900 (Sebetralstat) for On-Demand Treatment of Angioedema Attacks in Adolescent and Adult Patients With Hereditary Angioedema (HAE)PHASE3 COMPLETED 136Feb 22, 2022Dec 31, 2023May 2, 202566 United States, Australia +19
NCT04208412A Phase II, Cross-over Clinical Trial Evaluating the Efficacy and Safety of KVD900 (Sebetralstat) in the On-demand Treatment of Angioedema Attacks in Adult Subjects With Hereditary Angioedema Type I or IIPHASE2 COMPLETED 84Jul 2, 2019Dec 8, 2020May 2, 202525 United States, Austria +8
NCT04349800A Single Dose Safety, Tolerability, Pharmacokinetic and Food Effect Study of KVD900 (Sebetralstat) in Healthy VolunteersPHASE1 COMPLETED 84Jan 4, 2018Sep 10, 2018Apr 29, 20251 United Kingdom
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
The proportion of pediatric patients with HAE Types I or II who take any sebetralstat dose, who experience any AE(s) (including fatal AEs) during the study, irrespective of uses of other medications and sebetralstat discontinuations for any reason.
Throughout the duration of the trial, up to 1 year.
Frequencies and percentages of patients with AEs, AEs within 2 days of IMP administration, serious AE's and AEs causing premature discontinuation.
AEs will be recorded from the first dose of IMP in the KVD900-302 trial up to and including the end of study (EOS) visit, a maximum of 2 years for each patient.
Number and percentage of patients with normal or abnormal laboratory results at each scheduled visit.
Throughout the duration of the trial.
Number and percentage of patients with normal or abnormal vital sign results at each scheduled visit
Throughout the duration of the trial.
Pharmacokinetics - Cmax
Up to 6 hours after IMP administration
Pharmacokinetics - Tmax
Up to 6 hours after IMP administration
Pharmacokinetics - AUC
Up to 6 hours after IMP administration
Time to Beginning of Symptom Relief Patient Global Impression of Change (PGI-C)
Within 12 hours of the first investigational medicinal product (IMP) administration.

The analysis of time to the beginning of symptom relief defined as at least "a little better" (2 time points in a row) on the PGI-C within 12 hours of the first IMP administration using the Gehan score transformation test for Full Analysis Set (FAS). Attacks were treated as right-censored at 12 hours if they did not achieve beginning of symptom relief defined by PGI-C as at least "a little better" (2 time points in a row) or received conventional attack treatment prior to time-to-event within 12 hours of the first IMP administration. When an endpoint result was non-evaluable (NE) within 12 hours, if the event did occur, the event must have occurred \>12 hours following study drug.

Time to Conventional Attack Treatment Use Within 12 Hours of Study Drug (Full Analysis Set)
12 hours

The primary variable for statistical comparison between treatments in Part 2 of the study was time to use of conventional attack treatment (pdC1INH or rhC1INH intravenous \[iv\] or icatibant) within 12 hours of study drug. Censoring occurs where a subject did not use conventional attack treatment within 12h post-study drug dosing. When an endpoint result was non-calculable (NC) within 12 hours, if the event did occur, the event must have occurred \>12 hours following study drug.

Number of Subjects with Adverse Events
Change from pre-dose to last visit, 5-7 days post dose.
Number of Subjects with Serious Adverse Events
Change from pre-dose to last visit, 5-7 days post dose.
Number of participants with clinically significant changes in laboratory assessments
Throughout study until last visit, 5-7 days post dose.
Number of participants with clinically significant changes in vital signs
Throughout study until last visit, 5-7 days post dose.
Number of participants with clinically significant changes in electrocardiogram (ECG) measurements
Throughout study until last visit, 5-7 days post dose.
Secondary Endpoints
Caregiver Global Impression of Change (CaGI-C): Time to beginning of symptom relief defined as at least "a little better" (2 time points in a row)
Within 12 hours of the first IMP administration.
Caregiver Global Impression of Severity (CaGI-S): Time to first incidence of decrease from baseline (2 time points in a row)
Within 12 hours of the first IMP administration.
CaGI-S: Time to HAE attack resolution defined as "none"
Within 24 hours of the first IMP administration
Unlock Study Endpoints
Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
150 mg Dose GroupOTHERPatients will take a single 150 mg dose of KVD900.
300 mg Dose GroupOTHERPatients will take a single 300 mg dose of KVD900.
600 mg Dose GroupOTHERPatients will take a single 600 mg dose of KVD900.
KVD900 600 mgEXPERIMENTAL -
KVD900 300 mgEXPERIMENTAL -
Experimental: KVD900 300 mgEXPERIMENTAL -
PlaceboPLACEBO_COMPARATOR -
Part 1EXPERIMENTALSubjects received a single dose of 600 mg KVD900.
Part 2 - Sequence 1: 600 mg KVD900, Then PlaceboEXPERIMENTALSubjects received a single dose of 600 mg KVD900 to treat the first eligible HAE attack. Following resolution of this attack, subjects received a second single dose of placebo to treat the second eligible HAE attack.
Part 2 - Sequence 2: Placebo, Then 600 mg KVD900EXPERIMENTALSubjects received a single dose of placebo to treat the first eligible HAE attack. Following resolution of this attack, subjects received a second single dose of 600 mg KVD900 to treat the second eligible HAE attack.
Single Ascending Dose - 5 mgEXPERIMENTAL -
Single Ascending Dose - 10 mgEXPERIMENTAL -
Single Ascending Dose - 20 mgEXPERIMENTAL -
Single Ascending Dose - 40 mgEXPERIMENTAL -
Single Ascending Dose - 80 mgEXPERIMENTAL -
Single Ascending Dose - 160 mgEXPERIMENTAL -
Single Ascending Dose - 300 mgEXPERIMENTAL -
Single Ascending Dose - 600 mgEXPERIMENTAL -
Formulation ScreenEXPERIMENTAL -
Food EffectEXPERIMENTAL -
Interventions
NameTypeDescription
KVD900 150 mgDRUGKVD900 Tablet 150 mg (2 x 75 mg)
KVD900 300 mgDRUGKVD900 Tablet 300 mg (1 x 300 mg)
KVD900 600 mgDRUGKVD900 Tablet 600 mg (2 x 300 mg)
Drug: KVD900 300 mgDRUGKVD900 Tablet 300 mg
PlaceboDRUGPlacebo to KVD900 Tablet
KVD900DRUGKVD900 tablet 600 mg
Placebo to KVD900DRUGPlacebo
Unlock Study Design Details
Eligibility Criteria
Age Range2 Years — 11 Years
SexALL
Healthy VolunteersNo
Study Sites24

Inclusion Criteria: 1. Male or female patients 2 to 11 years of age. 2. Confirmed diagnosis of HAE Type I or II. 3. For patients ≥20 kg at screening, patient has had at least 1 documented HAE attack in the last year prior to screening. 4. Caregiver, as assessed by the Investigator, must be able to ...

Countries:United StatesCanadaFranceGermanyIsraelItalyJapanAustraliaAustriaBulgariaGreeceHungaryNetherlandsNew ZealandNorth MacedoniaPolandPortugalRomaniaSaudi ArabiaSlovakiaSouth AfricaSpainUnited KingdomPuerto RicoCzechia
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
HIGHJun 8, 2026NCT05511922Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 8, 2026NCT05511922Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 8, 2026NCT05511922Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 5, 2026NCT05505916Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 5, 2026NCT05505916Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 5, 2026NCT05505916Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 5, 2026NCT05505916Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWMay 26, 2026NCT05511922primaryCompletionDate: changed
LOWMay 26, 2026NCT05505916primaryCompletionDate: changed
LOWMay 24, 2026NCT05511922studyFirstPostDate: changed
LOWMay 24, 2026NCT05505916studyFirstPostDate: changed