diff --git a/apps/backend/server.js b/apps/backend/server.js
index e37e7d5..0ea8337 100644
--- a/apps/backend/server.js
+++ b/apps/backend/server.js
@@ -2055,6 +2055,12 @@ app.put('/api/admin/pharmacy-medicines/:id', requireAdmin, async (req, res) => {
     const id = parseInt(req.params.id);
     const { price, stock } = req.body;
 
+    // Get current state before update to detect stock becoming available
+    const current = await userDbGet(
+      'SELECT * FROM pharmacy_medicines WHERE id = ?',
+      [id]
+    );
+
     await userDbRun(
       'UPDATE pharmacy_medicines SET price = ?, stock = ? WHERE id = ?',
       [price || null, stock || 0, id]
@@ -2069,6 +2075,16 @@ app.put('/api/admin/pharmacy-medicines/:id', requireAdmin, async (req, res) => {
       return res.status(404).json({ error: 'Relationship not found' });
     }
 
+    // Send push if stock went from 0 to available
+    if (current && (current.stock || 0) === 0 && (stock || 0) > 0) {
+      const pharmacy = await userDbGet('SELECT id, name FROM pharmacies WHERE id = ?', [updated.pharmacy_id]);
+      sendPushForMedicine({
+        medicine_nregistro: updated.medicine_nregistro,
+        medicine_name: updated.medicine_name,
+        pharmacy,
+      }).catch(err => console.error('[push] stock-change fanout error:', err));
+    }
+
     res.json(updated);
     appMetrics.pharmacyMedicineLinkTotal.add(1, { op: 'update' });
   } catch (error) {