diff --git a/conversations.php b/conversations.php
index b9b8db4..392c95b 100644
--- a/conversations.php
+++ b/conversations.php
@@ -2162,6 +2162,12 @@
             }
 
             async sendMessage() {
+                // If a file is selected (media preview active), delegate to sendMediaMessage to avoid duplicate sends
+                if (this.selectedFile) {
+                    await this.sendMediaMessage();
+                    return;
+                }
+
                 const input = document.getElementById('message-input');
                 const message = input.value.trim();
                 const messageType = document.getElementById('message-type') ? document.getElementById('message-type').value : 'text';
@@ -2359,10 +2365,10 @@
                 // Mostrar preview
                 preview.style.display = 'block';
                 
-                // Cambiar comportamiento del botón enviar
+                // Use the main send handler: `sendMessage` will delegate to media send when a file is selected
                 const sendBtn = document.getElementById('send-btn');
-                const originalHandler = sendBtn.onclick;
-                sendBtn.onclick = () => this.sendMediaMessage();
+                // ensure send button is enabled
+                if (sendBtn) sendBtn.disabled = false;
             }
             
             formatFileSize(bytes) {