For more information and updates please visit:
Bupropion (Zyban) back in stock (ncsct.co.uk)
One Adverse Event change has occurred since Zyban was out of stock. This is in Section 4.4 Special Warnings and Precautions where a caution has been added about Brugada syndrome.
The full Zyban Summary of Product characteristics with updates can be found here https://www.ncsct.co.uk/publication_bupropion.php