TheraRadar
Data updated: Nov 8, 2026

CHENODIOL · LGM PHARMA

Rare Disease Approved 1983-07-28

Chenodiol is a bile acid used for adults living with cerebrotendinous xanthomatosis (CTX). It helps patients with this condition by replacing the naturally occurring chenodeoxycholic acid that their bodies are unable to produce sufficiently. By restoring these levels, the drug addresses the metabolic disruptions caused by a deficiency in the sterol 27-hydroxylase enzyme.

Source: FDA Label • Bile Acid

How CHENODIOL Works

This drug works by replacing deficient levels of endogenous chenodeoxycholic acid, which restores the activation of the farnesoid X receptor (FXR). This activation downregulates the CYP7A1 enzyme, resulting in the suppression and reduction of atypical bile acids and alcohols such as cholestanol and 23S-pentol.

Source: FDA Label
1
Indication
--
Phase 3 Trials
43
Years on Market

Details

Status
Prescription
First Approved
1983-07-28
Routes
ORAL
Dosage Forms
TABLET

Companies

Active Ingredient: CHENODIOL

CHENODIOL Approval History

2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
1 FDA actions from 2009 to 2009
Oct 2009 ORIGINAL
Update

What CHENODIOL Treats

1 indications

CHENODIOL is approved for 1 conditions since its original approval in 2009. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Cerebrotendinous Xanthomatosis
Source: FDA Label

CHENODIOL Boxed Warning

SPECIAL NOTE Because of the potential hepatoxicity of chenodiol, poor response rate in some subgroups of chenodiol treated patients, and an increased rate of a need for cholecystectomy in other chenodiol treated subgroups, chenodiol is not an appropriate treatment for many patients with gallstones. Chenodiol should be reserved for carefully selected patients and treatment must be accompanied by systematic monitoring for liver function alterations. Aspects of patient selection, response rates and...

CHENODIOL Competitive Set

Pro

Three rings of competition based on shared molecular targets and treated indications.

MoA expansion candidates

2

Same target(s), different indications — where else is this mechanism being explored?

Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to CHENODIOL

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

CTEXLI
CHENODIOL
1 shared
MIRUM
Shared indications:
Cerebrotendinous Xanthomatosis
🔬

Active Pipeline

Pro

Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

CHENODIOL FDA Label Details

Indications & Usage

Chenodiol is indicated for patients with radiolucent stones in well-opacifying gallbladders, in whom selective surgery would be undertaken except for the presence of increased surgical risk due to systemic disease or age. The likelihood of successful dissolution is far greater if the stones are floatable or small. For patients with nonfloatable stones, dissolution is less likely and added weight should be given to the risk that more emergent surgery might result form a delay due to unsuccessful treatment. Safety of use beyond 24 months is not established. Chenodiol will not dissolve calcified ...

⚠️ BOXED WARNING

SPECIAL NOTE Because of the potential hepatoxicity of chenodiol, poor response rate in some subgroups of chenodiol treated patients, and an increased rate of a need for cholecystectomy in other chenodiol treated subgroups, chenodiol is not an appropriate treatment for many patients with gallstones. ...

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CTEXLI

Full clinical data, patents, trials, and competitive landscape for chenodiol.

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.