diff --git a/app/Controllers/Billing/Ipd.php b/app/Controllers/Billing/Ipd.php
index da1eddf..8e6e6fb 100644
--- a/app/Controllers/Billing/Ipd.php
+++ b/app/Controllers/Billing/Ipd.php
@@ -990,6 +990,9 @@ class Ipd extends BaseController
         return $this->response
             ->setHeader('Content-Type', 'application/pdf')
             ->setHeader('Content-Disposition', 'inline; filename="' . $fileName . '"')
+            ->setHeader('Cache-Control', 'no-store, no-cache, must-revalidate, max-age=0')
+            ->setHeader('Pragma', 'no-cache')
+            ->setHeader('Expires', '0')
             ->setBody($mpdf->Output($fileName, 'S'));
     }