Look up side effect in Wiktionary, the free dictionary.

Side effect can mean:

• Therapeutic effect, an unintended but desirable consequence of medical treatment
• Adverse effect, an unintended and undesirable consequence of medical treatment
  • Adverse drug reaction, such an effect caused by a drug
• Unintended consequence, an effect that is unforeseen, regardless of type or quality
• Externality, an economic term for the effects of a transaction on parties who did not make the original agreement
• Side effect (computer science), a state change caused by a function or expression
• Side Effects (2005 film), starring Katherine Heigl, a satirical look at the pharmaceutical industry
• Side Effects, a collection of short stories by Woody Allen
• Side Effects (TV series), a Canadian TV series
• The Side Effects, a 1980s indie rock band
• Side Effect, a 1970s soul band
• Side Effects (X-Wife album), an album by the band X-Wife
• Side Effects (song), a song by Mariah Carey featuring Young Jeezy on her album E=MC²

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