Show array of post ID's

In the code below $idspost [] = $post->ID; stores an array of post ID’s belonging to posts related to the current post by tag. How can I display those posts, only if they exist? I need to pass on the array $idspost [] = $post->ID; to something like a standard loop:

<?php if (have_posts()) : ?>
  <div><p>some header text and styling</p> <!--if no posts nothing will be shown-->
    <?php while (have_posts()) : the_post(); ?>
      do stuff... <!--get the permalink, title etc...-->
    <?php endwhile; ?>
  </div>
<?php endif; ?>

My code:

<?php
$tags = wp_get_post_tags($post->ID);
if ($tags) {
  $second_tag = $tags[1]->term_id;
  $args=array(
    'tag__in' => array($second_tag),
    'post__not_in' => array($post->ID),
    'showposts'=>5, //Display this number of related posts
    'ignore_sticky_posts'=>1
   );
  $my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
  while ($my_query->have_posts()) : $my_query->the_post();
  if (!in_array($post->ID, $ids)) {; $idspost [] = $post->ID; ?>

<?php }
    $ids[]= $post->ID;
    endwhile;
  }
}
?>