By default, when you click the heart icon on the action bar it activates the Regenerate ability. If you're poisoned, however, this changes to "Cure Poison" which will use a poison cure - if you have one.
As I see it, you have a few options:
1) Keep a poison cure in your inventory.
2) Activate the Regenerate ability from the Constitution Abilities tab instead.
3) Use another healing method. (This would be my recommendation; Regenerate uses up all your adrenaline, stopping you using your more powerful combat abilities.)
11-Feb-2022 10:03:31