IV
IV may refer to:
- In medicine, an acronym for intravenous, as in "IV drip" (or simply "IV") for intravenous drip, or "IV drug use" for intravenous drug use
- In cryptography, an acronym for initialization vector
- IV is also the Roman numeral for 4
This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.