Last reviewed 2026-05-22 · How we verify

Periclor (PETRICHLORAL)

Phase 2 active Small molecule ✓ Verified May 2026

Periclor (generic name: PETRICHLORAL) is a petrichloral drug. It is currently in Phase 2 development.

Periclor works by enhancing the activity of neurotransmitters in the brain to induce relaxation and sleep.

Periclor is a small molecule with the synonyms PENTAERYTHRITOL CHLORAL, PETRICHLORAL, and PETRICLORAL.

Likelihood of approval

12.3% 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).
CNS / neurology attrition -3.0pp
CNS drugs have historically high Phase 3 failure rates (notably in Alzheimer disease + major depression).

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	PETRICHLORAL
Drug class	petrichloral
Modality	Small molecule
Therapeutic area	Neuroscience
Phase	Phase 2

Mechanism of action

Imagine your brain is a busy city with many different streets and intersections. Periclor helps calm down the traffic by increasing the activity of certain chemical messengers, or 'cars,' that help you relax and fall asleep. This can make it easier to fall asleep and stay asleep, but it's not yet clear how it works or what its long-term effects might be.

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Competitive intelligence

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

Periclor CI brief — competitive landscape report
Periclor updates RSS · CI watch RSS

Frequently asked questions about Periclor

What is Periclor?

Periclor (PETRICHLORAL) is a petrichloral drug.

How does Periclor work?

Periclor works by enhancing the activity of neurotransmitters in the brain to induce relaxation and sleep.

What is the generic name of Periclor?

PETRICHLORAL is the generic (nonproprietary) name of Periclor.

What drug class is Periclor in?

Periclor belongs to the petrichloral class. See all petrichloral drugs at /class/petrichloral.

What development phase is Periclor in?

Periclor is in Phase 2.

Drug class: All petrichloral drugs
Therapeutic area: All drugs in Neuroscience

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