Definition of Intramuscular (IM)
Intramuscular (IM): An intramuscular (IM) medication is given by needle into the muscle. This is as opposed to a medication that is given by a needle, for example, into the skin (intradermal) or just below the skin (subcutaneous) or into a veinSource: MedTerms™ Medical Dictionary
Last Editorial Review: 9/20/2012
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