diff --git a/rpgpack/commands/dndaddunit.py b/rpgpack/commands/dndaddunit.py
index 56f6d720..b7637968 100644
--- a/rpgpack/commands/dndaddunit.py
+++ b/rpgpack/commands/dndaddunit.py
@@ -5,6 +5,7 @@ import royalnet.utils as ru
 from ..types import Faction
 from ..tables import DndBattleUnit
 from ..utils import get_active_battle
+from ..types import Health
 
 
 class DndaddunitCommand(rc.Command):
@@ -37,6 +38,11 @@ class DndaddunitCommand(rc.Command):
         if len(units_with_same_name) != 0:
             raise rc.InvalidInputError("A unit with the same name already exists.")
 
+        try:
+            health = Health.from_text(health)
+        except ValueError:
+            raise rc.InvalidInputError("Invalid health string.")
+
         dbu = DndBattleUnitT(
             linked_character_id=None,
             initiative=initiative,
@@ -54,4 +60,4 @@ class DndaddunitCommand(rc.Command):
                          f"joins the battle!")
 
         if dbu.health.hidden:
-            await data.delete_invoking()
\ No newline at end of file
+            await data.delete_invoking()