vitamin I
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Ibuprofen.
Register: humorous, slang
Where it’s used:
Used
American English
Examples
Ibuprofen has relieved pain and inflammation for millions of people. It works, scientists believe, by controlling the body's synthesis of a hormone called prostaglandin, which affects the inflammatory response to injury, stress, or injury. Some triathletes tape the little brown pills to their bikes
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “vitamin I” mean?
Ibuprofen.
Is “vitamin I” formal or informal?
vitamin I is generally humorous, slang.