Half-Life
The time it takes for half of the medication to leave your system.
Definition
The time it takes for half of the medication to leave your system.
Why it matters
Half-life is why a missed dose inside 48 hours is a shrug and a missed fortnight is a conversation with your provider before you inject anything.
Source: this entry is drawn from “The Glossary” in FAT BITCH: Killing the Willpower Myth by Cat Clark (UNLIT Publishing, October 15, 2026). The full chapter has the context this page does not. Get on The First Copy List and we send the order link the day it goes live.
None of this is medical advice. It is educational material drawn from FAT BITCH: Killing the Willpower Myth by Cat Clark, and it does not replace your prescriber, your pharmacist, or your actual doctor. If something here does not match what your care team told you, go with your care team and bring this along to the conversation.