Vitamin C in MIMIC database, where?

Hi everyone,
I am working on a project that explores the clinical effects of Vitamin C (ascorbic acid) in critically ill patients.

Recently, I noticed that three published papers (up to Jan 2026) reported studies using “Vitamin C exposure” based on MIMIC data. However, I have had great difficulty locating Vitamin C records in the database.

Specifically:
Does Vitamin C actually exist as a structured variable in MIMIC (III or IV)?
If yes, in which tables should it appear (pharmacy / prescriptions / inputevents / others)?
Are there confirmed itemid (or drug names / codes) that correspond to intravenous or oral Vitamin C?
I have searched for keywords in d_items, d_labitems, and medication tables, but still cannot reliably identify Vitamin C administration.
If anyone has experience with this or has successfully extracted Vitamin C data from MIMIC, I would really appreciate your guidance or examples.

Thank you very much!

Start by reviewing the MIMIC III and IV medication-related tables named in the issue, including d_items, d_labitems, pharmacy, prescriptions, and inputevents. Search the documented drug names, itemids, and codes for intravenous or oral Vitamin C. Done means providing a reliable table and identifier reference, or documenting that no structured Vitamin C record was found.