Principles of Pharmacology

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• The amount of medication given at one time, expressed in standard units (mg, mL, mcg).

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• Administration of a medication as a mist sprayed into the nostrils for rapid absorption via nasal mucosa.

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• A pre-filled, spring-loaded device that delivers a single intramuscular dose with minimal user steps (e.g., epinephrine, naloxone).

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• The path by which a medication enters the body — oral (PO), sublingual (SL), intramuscular (IM), intravenous (IV), intranasal (IN), and others.

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• A drug's official, non-proprietary name, written in lowercase (e.g., acetaminophen).

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