as needed

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as needed

Add water to the mixture as needed.

Definition
  1. Adverb:
    • According to need; when necessary; not on a fixed schedule: This phrase indicates that an action should be performed only when a requirement or condition arises, rather than at predetermined times. It is often used in medical, technical, and general instructions.
Usage Examples
  • Adverb:
    • The doctor advised taking the pain medication as needed, not exceeding four doses per day.
    • Please check the oil level in the machine and refill as needed.
    • You may adjust the thermostat settings as needed throughout the day.
Advanced Usage
  • "PRN" (Medical Abbreviation): In healthcare, the Latin abbreviation "PRN" (pro re nata) is used on prescriptions with the same meaning as "as needed."
    • The prescription read: "Take one tablet PRN for anxiety."
  • Implied Flexibility: The phrase implies a degree of judgment and discretion on the part of the person performing the action.
    • The supervisor authorized overtime as needed to complete the project.
Variants and Related Words
  • As required: A more formal synonym with identical meaning.
    • Supplies will be ordered as required.
  • As necessary: Another common synonym.
    • Apply more pressure as necessary to stop the bleeding.
Synonyms
  • When needed
  • If required
  • On demand
Related Phrases
  • On an as-needed basis: A more formal or extended version of the phrase.
    • Staff are hired on an as-needed basis during the busy season.
as needed

Add water to the mixture as needed.

Adverb
  1. according to need (physicians use PRN in writing prescriptions)
    • add water as needed

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