What is a normal INR level at sea level?

A normal International Normalized Ratio (INR) level for individuals not on anticoagulant therapy typically ranges from 0.8 to 1.1. For patients on anticoagulants, therapeutic INR levels can vary depending on the condition being treated, generally ranging from 2.0 to 3.0 for most indications. It's important to consult with a healthcare provider for specific target ranges based on individual health needs.