Effect

Effect may refer to:

• A result or change of something
  • List of effects
  • Cause and effect, an idiom describing causality

In pharmacy and pharmacology:

• Drug effect, a change resulting from the administration of a drug
  • Therapeutic effect, a beneficial change in medical condition, often caused by a drug
  • Adverse effect or side effect, an unwanted change in medical condition caused by a drug
• Dose-response effect, the relationship between a drug dose and its effect, plotted on a dose-response curve

In media:

• Special effect, an artificial illusion
  • Sound effect, an artificially created or enhanced sound
  • Visual effects, artificially created or enhanced images
• Audio signal processing
  • Effects unit, a device used to manipulate electronic sound
    • Effects pedal, a small device attached to an instrument to modify its sound

Miscellaneous:

• Effects, one's personal property or belongings
• Effects (G.I. Joe), a fictional character in the G.I. Joe universe
• Effects (film), a 2005 film
• Effect size, a measure of the strength of a relationship between two variables
• Effect system, formal system which describes the computational effects of computer programs

Amendments to the constitution of the United States: (Bill of Rights) Amendment IV "The right of the people to be secure in their persons, house, papers, and effects...