November 26, 2015
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Definition of IM (intramuscular)

IM (intramuscular): An IM medication is given by needle into the muscle. This is as opposed to a medication that is given by a needle into the skin (intradermal) , just below the skin (subcutaneous) or into a vein (intravenous).

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 9/20/2012

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