Recent Updates
Recently added Catalysts

QTORIN 3.9% Rapamycin Anhydrous

Phase 3

Microcystic Lymphatic Malformation | Small molecule | Rare Disease |Palvella Therapeutics, Inc.|Last Updated: Mar 27, 2026

Target and mechanism

ModalitySmall molecule

Also known as QTORIN 3.9% rapamycin anhydrous gel, QTORIN 3.9% Rapamycin Anhydrous Gel

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment51

FDA Designations

BREAKTHROUGH_THERAPYFAST_TRACKORPHAN_DRUG

Clinical trial landscape

QTORIN 3.9% Rapamycin Anhydrous · 3 trials · 3 indications

Phase 3 2Phase 2 1
NCT06239480SELVA: A Phase 3 Study Evaluating QTORIN 3.9% Rapamycin Anhydrous Gel in the Treatment of Microcystic Lymphatic MalformationsMicrocystic Lymphatic Malformation
ACTIVE NOT_RECRUITING51 Analytics
NCT05180708A Multicenter, Phase 3 Randomized, Double-Blind, Vehicle-Controlled Study Evaluating the Safety and Efficacy of QTORIN 3.9% Rapamycin Anhydrous Gel in the Treatment of Pachyonychia CongenitaPachyonychia Congenita
COMPLETED87 Analytics
PHASE3ACTIVE NOT_RECRUITING
SELVA: A Phase 3 Study Evaluating QTORIN 3.9% Rapamycin Anhydrous Gel in the Treatment of Microcystic Lymphatic Malformations
Microcystic Lymphatic MalformationUnlock trial analytics
PHASE3COMPLETED
A Multicenter, Phase 3 Randomized, Double-Blind, Vehicle-Controlled Study Evaluating the Safety and Efficacy of QTORIN 3.9% Rapamycin Anhydrous Gel in the Treatment of Pachyonychia Congenita
Pachyonychia CongenitaUnlock trial analytics

Study Endpoints

Primary Endpoints

Overall microcystic lymphatic malformations Investigator Global Assessment (mLM-IGA)
At Week 24

A multi-point scale with higher values indicating improvement.

Patient Global Assessment of Activities Difficulty Scale
6 months
Incidence of Treatment-Emergent Adverse Events
Week 12

Secondary Endpoints

Change in the blinded clinician microcystic lymphatic malformations Multicomponent Severity Scale (mLM-MCSS)
At Week 24
Change in the live clinician microcystic lymphatic malformations Multicomponent Severity Scale (mLM-MCSS)
Change from Baseline to Week 24
Overall patient global impression of change (PGI-C)
Change from Baseline to Week 24
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ActiveEXPERIMENTAL -
VehiclePLACEBO_COMPARATOR -
Single-arm, open-labelEXPERIMENTAL -

Interventions

NameTypeDescription
QTORIN 3.9% Rapamycin Anhydrous GelDRUGQTORIN 3.9% Rapamycin Anhydrous Gel
VehicleDRUGMatching vehicle (QTORIN anyhydrous gel)
Unlock Study Design Details

Eligibility Criteria

Age Range3 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites15

Key Inclusion Criteria: * Participant must be at least 3 years of age at time of consent/assent * Participant must have a clinically confirmed superficial/cutaneous microcystic lymphatic malformation Key Exclusion Criteria: * Participants who have vascular malformations that interfere with evalua...

Countries:United StatesUnited Kingdom
Unlock Eligibility Criteria

Frequently asked questions about QTORIN 3.9% Rapamycin Anhydrous

What is QTORIN 3.9% Rapamycin Anhydrous used for?

QTORIN 3.9% Rapamycin Anhydrous is an investigational topical gel being developed for the treatment of rare diseases, including Pachyonychia Congenita, Cutaneous Venous Malformations, and Microcystic Lymphatic Malformation. It is a small molecule therapy in Phase 3 clinical development for these conditions.

What does QTORIN 3.9% Rapamycin Anhydrous target?

QTORIN 3.9% Rapamycin Anhydrous contains rapamycin, which targets the mTOR pathway. By inhibiting mTOR, it is designed to modulate cellular growth and proliferation, which is relevant to the abnormal tissue growth seen in the rare diseases it is being studied for.

Who makes QTORIN 3.9% Rapamycin Anhydrous?

QTORIN 3.9% Rapamycin Anhydrous is being developed by Palvella Therapeutics, Inc., a biopharmaceutical company focused on rare diseases. Palvella Therapeutics is publicly traded under the ticker symbol PVLA.

What phase is QTORIN 3.9% Rapamycin Anhydrous in?

QTORIN 3.9% Rapamycin Anhydrous is in Phase 3 clinical development. It has received Breakthrough Therapy, Fast Track, and Orphan Drug designations from the FDA for its investigational use in rare disease indications.

What clinical trials is QTORIN 3.9% Rapamycin Anhydrous in?

QTORIN 3.9% Rapamycin Anhydrous is being studied in several trials. NCT05180708 is a completed Phase 3 study in Pachyonychia Congenita. NCT06239480 is an active Phase 3 study in Microcystic Lymphatic Malformations. NCT06653842 is an active Phase 2 study in Cutaneous Venous Malformations.

Is QTORIN 3.9% Rapamycin Anhydrous the same as PTX-022?

QTORIN 3.9% Rapamycin Anhydrous is also known as QTORIN 3.9% rapamycin anhydrous gel. In clinical trials, it has been referred to as PTX-022, as seen in the study of Cutaneous Venous Malformations, where the drug is described as PTX-022 (Sirolimus) Topical Gel 3.9%.