Contrast premedication timeline

Enter the scan time and choose a regimen. Drugs, doses and timing are prefilled from the published regimens and can be changed to match your institution's protocol. The schedule prints on one page.

Prednisone 13, 7 and 1 hours before, with diphenhydramine 1 hour before.

Schedule

13-hour oral (elective)

Enter the scan date and time to see each dose's clock time.

Sources

  • Greenberger PA, Patterson R. The prevention of immediate generalized reactions to radiocontrast media in high-risk patients. J Allergy Clin Immunol. 1991;87(4):867-872. PubMed
  • Regimens as listed in the ACR Manual on Contrast Media (American College of Radiology). See the manual for indications, alternatives and breakthrough reactions.

For licensed clinicians. Use with clinical judgment. Premedication does not prevent all reactions; follow your institution's protocol.