diff --git a/Resources/Locale/en-US/deltav/guidebook/chemistry/effects.ftl b/Resources/Locale/en-US/deltav/guidebook/chemistry/effects.ftl
new file mode 100644
index 00000000000..886e5b0c4f0
--- /dev/null
+++ b/Resources/Locale/en-US/deltav/guidebook/chemistry/effects.ftl
@@ -0,0 +1,5 @@
+reagent-effect-guidebook-addicted =
+    { $chance ->
+        [1] Causes
+        *[other] cause
+    } an addiction.