Terms Definitions 
 IM  Intramuscular 
 IV  Intravenous 
 IVPB  Intravenous Piggyback 
 TPN  Total Parenteral Nutrition 
 SC  Subcutaneous (underneath the skin) 
 Sq  Subcutaneous (underneath the skin) 
 Sl  Sublingual (under the tongue) 
 ID  Intradermal (2nd layer of skin) 
 IC  Intracardiac (straight to heart) 
 IT  Intrathecal (applied to fluid of brain/spinal cord) 
 IA  Intra-arterial (applied to artery) 
 po  by mouth 
 o.d.  right eye 
 o.s.  left eye 
 o.u.  both eyes, each eye 
 a.d.  right ear 
 a.s.  left ear 
 a.u.  both ears, each ear 
 NPO  nothing by mouth