Stop use of morphine in fight

[Llight]

Whats the best way to stop users using morphine in a fight have tried what other user on here have suggested but none work

[KyleMassacre]

There should be something in header.php that is supposed to not allow users to leave the page while attacking or they lose all xp. Or in attack.php you can hide the menu so they cant access their inventory. Or another option would be if they are in attack mode you can add in itemuse.php something along the the lines of an if statement saying like

if ($_SESSION['attack']) {
echo "You cant do this";
$h-> endpage();
exit;
}