# Iohexol

Source: https://onco.cc/drugs/iohexol/  
OnCo record `iohexol` (Imaging agent). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

One of the commonest dyes used for CT scans, given into a vein, by mouth or in other ways depending on the scan.

## Summary

GE Healthcare's Omnipaque (NDA 018956, first approved 26 December 1985) "is a radiographic contrast agent indicated for intrathecal, intra-arterial, intravenous, oral, rectal, intraarticular, and body cavity imaging procedures in adults and pediatric patients"; intravenous indications include "CT of the head and body". Its boxed warning concerns using only the iodine concentrations recommended for intrathecal procedures. ATC V08AB02.

## Fields

- Kind: Imaging agent
- Status: approved
- Last checked: 2026-11-04
- Also known as: iohexol; Omnipaque
- Tags: contrast-agents-gaps-2026-11; diagnostic
- Brand: Omnipaque
- Modality: Iodinated contrast agent for CT and X-ray imaging (intravenous, intra-arterial, intrathecal, oral, rectal)
- Mechanism: A non-ionic, low-osmolar iodinated molecule; iodine absorbs X-rays strongly, so blood vessels, organs and enhancing tumours appear bright on CT and X-ray.
- Approvals: US 1985: Intrathecal, intra-arterial, intravenous, oral, rectal, intra-articular and body cavity imaging, including CT of the head and body

## Sources

- Drugs@FDA Omnipaque (NDA 018956): https://www.accessdata.fda.gov/scripts/cder/daf/index.cfm?event=overview.process&ApplNo=018956
- DailyMed label: Omnipaque: https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=5088be1d-a708-1cac-e063-6394a90a2aff
- WHO ATC index V08AB: low osmolar X-ray contrast media: https://atcddd.fhi.no/atc_ddd_index/?code=V08AB&showdescription=no

## Connected records

- technologies: [CT (computed tomography)](https://onco.cc/technologies/ct/), [Iodinated and barium contrast for CT and X-ray](https://onco.cc/technologies/iodinated-contrast-media/)
- companies: [GE HealthCare](https://onco.cc/companies/ge-healthcare/)

---
JSON: https://onco.cc/api/v1/entities/iohexol.json