diff --git a/added_reactions/tym.py b/added_reactions/tym.py
new file mode 100644
index 0000000..11d477d
--- /dev/null
+++ b/added_reactions/tym.py
@@ -0,0 +1,27 @@
+# Tyramine (Tym) reactions
+
+# EC Number 4.1.1.25 https://biocyc.org/META/NEW-IMAGE?type=REACTION&object=TYROSINE-DECARBOXYLASE-RXN
+
+tyr = model.metabolites.get_by_id("tyr__L_c")
+h = model.metabolites.get_by_id("h_c")
+co2 = model.metabolites.get_by_id("co2_c")
+tym = Metabolite(
+    "tym_c",
+    formula="C8H12NO",
+    name="Tyramine",
+    compartment="c"
+)
+
+tyrosine_decarboxylase = Reaction("TDC")
+tyrosine_decarboxylase.name = "Tyrosine Decarboxylase Reaction"
+tyrosine_decarboxylase.add_metabolites(
+    {
+        tyr: -1.0,
+        h: -1.0,
+        co2: 1.0,
+        tym: 1.0
+    }
+)
+
+model.add_reactions([tyrosine_decarboxylase])
+model.optimize().objective_value