Canadian Practical Nurse Registration Examination (CPNRE) Practice Exam

Heparin typically has an anticoagulant effect that lasts around 4 to 6 hours in the body when administered intravenously. This duration can vary somewhat based on factors such as the dose given, the mode of administration (e.g., IV or subcutaneous), and individual patient characteristics, including renal function and body weight.

When heparin is given subcutaneously, its effect might last a bit longer but is generally still in the range of 4 to 6 hours. The shorter effect compared to some other anticoagulants makes heparin suitable for use in situations where rapid adjustments to coagulation status are necessary, such as during certain medical procedures or in managing conditions like thrombosis.

Understanding the pharmacokinetics of heparin is vital for nursing practice, particularly when monitoring patients for signs of bleeding or when considering the timing of subsequent doses. This knowledge helps inform safe medication administration and the management of anticoagulation therapy.