Clinical Trials

Multiple clinical trials sponsored by industry entities, including Eiger BioPharmaceuticals, have evaluated the therapeutic potential of clemizole across viral and oncological indications. Specifically, a completed Phase 1b trial assessed the safety, tolerability, pharmacokinetics, and pharmacodynamics of oral clemizole hydrochloride in hepatitis C patients. In addition, a Phase 2a pilot study with an unknown recruitment status was initiated to evaluate the compound in hepatocellular carcinoma, underscoring clinical development efforts targeting liver diseases.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03069508 Unknown status
Hepatocellular Carcinoma
Eiger Group International Inc.
2017-02-13 Phase 2
NCT00945880 Completed
Hepatitis C
Eiger BioPharmaceuticals
2009-07 Phase 1

(data from https://clinicaltrials.gov, updated on 2024-05-22)

Check the Clemizole product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Clemizole acts as an antagonist of histamine H1 receptors and an inhibitor of TRPC5 ion channels, blocking intracellular cation influx and downstream biochemical cascades to suppress aberrant cellular activation. By inhibiting these signaling pathways and viral replication processes, the compound provides therapeutic relevance in targeting hepatocellular carcinoma and hepatitis C infection.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.