What is preparation H as far as hermorrhoid treatment is concerned and how is it made?

Many answers provided to the question of how hermorrhoids could be cured made allusion to the use of Preparation H. I want to know what exactly it is, what it consists of, how it is prepared, if it has any side effects, how rapid is its action and also how effective it is in treating hermorrhoids.
Thank you.

vpn saudi

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).