Last reviewed 2026-05-26 · How we verify

Yigansan

China Medical University Hospital · Phase 2 active Small molecule ✓ Verified May 2026

Yigansan is a Small molecule drug developed by China Medical University Hospital. It is currently in Phase 2 development. Also known as: YGS.

Yigansan is being studied as a potential treatment for Tourette Disorder and Tic Disorders in a randomized, double-blind, placebo-controlled trial. The trial, NCT03564132, is evaluating the efficacy and safety of Yigansan in children and adolescents with Tourette's Disorder.

Likelihood of approval

15.3% vs 15.3% industry baseline

If approved by FDA: likely 2031–2034

Steps remaining: Phase 3 → NDA/BLA submission

Confidence: Medium

Why this estimate

Baseline phase 2 → approval rate +15.3pp
Industry-wide phase 2 drugs reach approval ~15.3% of the time (BIO/Informa 2023 industry benchmark across all therapeutic areas).

Predicted approval windows by jurisdiction (conditional on FDA approval)

Regulator	Country	Likely year	Lag vs FDA
FDA	US	2031–2034	—
EMA	EU	2032–2035	+0.7 yr
MHRA	GB	2032–2035	+0.7 yr
Health Canada	CA	2032–2036	+0.9 yr
TGA	AU	2032–2036	+1.2 yr
PMDA	JP	2032–2036	+1.5 yr
NMPA	CN	2033–2037	+2.3 yr
MFDS	KR	2032–2036	+1.4 yr
CDSCO	IN	2032–2037	+1.8 yr
ANVISA	BR	2033–2037	+2.3 yr

Hover any row for the lag rationale. Lag estimates are reduced when the drug has FDA Breakthrough or EMA PRIME designation (sponsors file globally in parallel).

Estimate based on the BIO/Informa industry phase transition rates plus per-drug modifiers for therapeutic area, sponsor type, FDA designations, mechanism, and trial design. Per-jurisdiction lags from Tufts CSDD international approval studies. Not investment, clinical or regulatory advice. Methodology: /methodology#likelihood.

At a glance

Generic name	Yigansan
Also known as	YGS
Sponsor	China Medical University Hospital
Modality	Small molecule
Therapeutic area	Other
Phase	Phase 2

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Key clinical trials

Evaluating the Efficacy and Safety of Yi-Gan San in Children and Adolescents With Tourette's Disorder (PHASE2)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Source	Used for
ClinicalTrials.gov	Trial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

Yigansan CI brief — competitive landscape report
Yigansan updates RSS · CI watch RSS
China Medical University Hospital portfolio CI

Frequently asked questions about Yigansan

What is Yigansan?

Yigansan is a Small molecule drug developed by China Medical University Hospital.

Who makes Yigansan?

Yigansan is developed by China Medical University Hospital (see full China Medical University Hospital pipeline at /company/china-medical-university-hospital).

Is Yigansan also known as anything else?

Yigansan is also known as YGS.

What development phase is Yigansan in?

Yigansan is in Phase 2.

Manufacturer: China Medical University Hospital — full pipeline
Therapeutic area: All drugs in Other
Also known as: YGS

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing