Research Library

Ketamine Research by Modality

Different routes produce different pharmacokinetics, response patterns, and access profiles.

Written by: Ira ZootMedically reviewed by: Ketalux Clinical Review PanelLast updated: June 6, 2026Evidence: Aggregated published research

Quick answer

Which route is most studied?

IV ketamine has the longest research history. Intranasal esketamine (Spravato) has the most regulatory data. IM, sublingual, and oral forms have growing but smaller evidence bases, with different bioavailability and duration profiles.

Browse by modality

IV ketamine

Longest research history; precise dose control.

IM ketamine

Single injection; comparable response to IV.

Intranasal esketamine (Spravato)

FDA-approved; insurance pathways.

Sublingual (troches / lozenges)

Common in at-home protocols; lower bioavailability.

Oral ketamine

First-pass metabolism; norketamine metabolite plays a role.

Educational content only. Not medical advice. Discuss any treatment decisions with a qualified clinician.

About the author

Ira Zoot

Independent publisher and editor of Ketalux, based in Chicago, Illinois. Ira commissions, edits, and reviews every article on the site and believes ketamine therapy — used responsibly — offers real hope for people living with depression, anxiety, PTSD, and chronic pain. Contact: ira@idigits.com.

Educational use only. The content on this page is provided for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Ketamine and related therapies carry risks and are appropriate only under qualified medical supervision. Always consult a licensed healthcare professional about your individual situation. Information may change as research evolves.