diff --git a/components/FormMolecule.vue b/components/FormMolecule.vue
index b74cf28..b864dce 100644
--- a/components/FormMolecule.vue
+++ b/components/FormMolecule.vue
@@ -252,8 +252,25 @@ function removeEquivalent(item: any) {
  * Add molecule
  */
 function add() {
-  // TODO
-  event('close');
+  // add molecule in database
+  $fetch('/api/molecule/molecule', {
+    method: 'POST',
+    body: JSON.stringify({
+      id: molDisplay.value.id,
+      name: molDisplay.value.name,
+      formula: molDisplay.value.formula,
+      mass: molDisplay.value.mass,
+      synonyms: (molDisplay.value?.synonyms || []),
+      userSyns: (molDisplay.value?.userSyns || []),
+      equivalents: listEquivalents.value.map((val) => val.id)
+    })
+  })
+  .then(() => {
+    event('close');
+  })
+  .catch((error) => {
+    // TODO manage error
+  });
 }
 /**
  * Update molecule
@@ -271,7 +288,7 @@ function update() {
     validate-on="blur"
     persistent
     :disabled="props.action === 'view'"
-    @submit.prevent="props.action === 'modify' ? update : add"
+    @submit.prevent="add"
   >
     <v-card>
       <!-- title of dialog box about action -->
diff --git a/components/ManageMolecule.async.vue b/components/ManageMolecule.async.vue
index bcb3063..9900835 100644
--- a/components/ManageMolecule.async.vue
+++ b/components/ManageMolecule.async.vue
@@ -29,6 +29,7 @@ function add(){
   <table-db-action 
     name-db-table="view_tab_molecule"
     :add="add"
+    :update="dialogView"
   />
   <v-dialog
     v-model="dialogView"
diff --git a/db/init.sql b/db/init.sql
index f2b9f77..903a5f9 100644
--- a/db/init.sql
+++ b/db/init.sql
@@ -162,36 +162,35 @@ CREATE TABLE synonym
 (
   id_mol SERIAL REFERENCES molecule (id) ON DELETE CASCADE,
   name VARCHAR(255),
-  user BOOLEAN DEFAULT FALSE,
+  is_user BOOLEAN DEFAULT FALSE,
   PRIMARY KEY (id_mol, name)
 );
 
 -- view to show information of molecule in tab
 CREATE VIEW view_tab_molecule AS
 SELECT molecule.id AS id, molecule.name AS name, formula, mass,
-       COUNT(DISTINCT (equivalent.id_mol_0, equivalent.id_mol_1)) AS equivalent
+       COUNT(equivalent.id_mol_0) AS equivalent
 FROM molecule
 LEFT JOIN equivalent ON molecule.id = equivalent.id_mol_0 
-                     OR molecule.id = equivalent.id_mol_1
-LEFT JOIN synonym ON molecule.id = synonym.id_mol
+                      OR molecule.id = equivalent.id_mol_1
 GROUP BY molecule.id;
 
 -- Function to get all names of equivalent molecules
-CREATE OR REPLACE FUNCTION func_equivalent_molecule(id_mol INTEGER)
+CREATE OR REPLACE FUNCTION func_equivalent_molecule(in_id_mol INTEGER)
 RETURNS TABLE(name VARCHAR(255)) AS $$
 BEGIN
     RETURN QUERY
     SELECT DISTINCT molecule.name AS name
     FROM molecule
-    LEFT JOIN equivalent ON molecule.id = equivalent.id_mol_0 
-                          OR molecule.id = equivalent.id_mol_1
-    WHERE molecule.id = id_mol;
+    JOIN equivalent ON molecule.id = equivalent.id_mol_0 
+      OR molecule.id = equivalent.id_mol_1
+    WHERE molecule.id = in_id_mol;
 
 END;
 $$ LANGUAGE plpgsql;
 
 -- Function to get all synonyms and equivalents of a molecule
-CREATE OR REPLACE FUNCTION func_synonym_equivalent_molecule(id_mol INTEGER)
+CREATE OR REPLACE FUNCTION func_synonym_equivalent_molecule(in_id_mol INTEGER)
 RETURNS TABLE(synonyms VARCHAR[], equivalents INTEGER[]) AS $$
 BEGIN
     RETURN QUERY
@@ -200,7 +199,7 @@ BEGIN
     LEFT JOIN equivalent ON molecule.id = equivalent.id_mol_0 
                           OR molecule.id = equivalent.id_mol_1
     LEFT JOIN synonym ON molecule.id = synonym.id_mol
-    WHERE molecule.id = id_mol;
+    WHERE molecule.id = in_id_mol;
 END;
 $$ LANGUAGE plpgsql;
 
diff --git a/server/api/molecule/[what].ts b/server/api/molecule/[what].ts
index de76e8d..3da6997 100644
--- a/server/api/molecule/[what].ts
+++ b/server/api/molecule/[what].ts
@@ -6,7 +6,7 @@
 
 import * as mol from "./functions"
 
-export default defineEventHandler(async (event: any) => {
+export default defineEventHandler(async (event: any) => {   
     // get what to you want to do
     const what = getRouterParam(event, "what");
     // get the method
@@ -33,6 +33,7 @@ export default defineEventHandler(async (event: any) => {
     }
     // In case of a post or put request, we need to get the body
     const body = await readBody(event)
-    return await funcMap[`${method}-${what}`](body.json());
+    
+    return await funcMap[`${method}-${what}`](body);
 
 });
\ No newline at end of file
diff --git a/server/api/molecule/functions.ts b/server/api/molecule/functions.ts
index 8dd1c23..50b097e 100644
--- a/server/api/molecule/functions.ts
+++ b/server/api/molecule/functions.ts
@@ -34,7 +34,7 @@ const getCheck = () => {
         return true;
     })
     .catch(() =>{
-        console.log('Database is empty');
+        console.log('error Database is empty');
         return false;
     });
 }
@@ -90,7 +90,7 @@ function getSynonym(id: number): Promise<string[] | number> {
     return queryDatabase(`
         SELECT name
         FROM synonym
-        WHERE id_molecule = $1`,
+        WHERE id_mol = $1`,
         [id])
     .then((result) => result.rows.map(
         (row: { name: string; }) => row.name))
@@ -103,6 +103,7 @@ function getSynonym(id: number): Promise<string[] | number> {
  * @returns number 0 if the operation is successful, 1 otherwise
  */
 function addMolecule(mol: tMolecule): Promise<number> {
+    console.log(mol);
     
     // Insert a new molecule into the database
     return queryDatabase(`
@@ -121,7 +122,11 @@ function addMolecule(mol: tMolecule): Promise<number> {
         return Promise.all(aPromises);
     })
     .then(() => 0)
-    .catch(() => 1);
+    .catch((error) => {
+        console.log(error);
+        
+        return 1;
+    });
 }
 
 /**
@@ -151,7 +156,7 @@ function addEquivalents(idMolecule: number, equivalents: number[]):
 function addSynonyms(idMolecule: number, synonyms: string[], user: boolean): Promise<void> {
     const promises = synonyms.map((synonym) => {
         return queryDatabase(`
-            INSERT INTO synonym (id_molecule, name, user) 
+            INSERT INTO synonym (id_mol, name, is_user) 
             VALUES ($1, $2, $3)`,
             [idMolecule, synonym, user]);
     });
@@ -199,7 +204,7 @@ function updateMolecule(mol: tMolecule): Promise<any> {
 function updateSynonyms(idMolecule: number, userSyn: string[]): Promise<void> {
     // Delete all user synonyms of the molecule from the database
     return queryDatabase(`
-        DELETE FROM synonym WHERE id_molecule = $1 AND user = $2`,
+        DELETE FROM synonym WHERE id_mol = $1 AND is_user = $2`,
         [idMolecule, true])
         // Insert all synonyms into the database
         .then(() => {