IV as the Roman number for four may refer to:

Trivia about iv

  • The last King William to rule England had this number after his name
  • It's the Roman numeral 4, or an abbreviation for a device that drips fluid into patients
  • It refers to fluids or drugs injected directly into a blood vessel
  • Intermittent infusion is a common type of this procedure also called a drip
  • Number of the William who was England's "Sailor King" from 1830 to 1837