Intramuscular (IM): Injection given directly in the muscle <EX> Flu shot

Intravenous (IV): Injection given directly in the vein <EX> Protonix IV (Pantoprazole sodium) treatment for gastroesophageal reflux disease (GERD)

Subcutaneous (SC / SQ): Injection given directly beneath the skin <EX> Heparin Sodium Injection, USP an anticoagulant drug