No, Wolfsbane potion is not very easy to make. It is believed to be very difficult to make and requires very valuable ingredients which are very difficult to procure for werewolves who are usually unemployed because of being ostracized by the magical community. It uses Wolfsbane as its primary ingredient. It was invented by Damocles Belby probably in the twentieth century. It is believed to be very difficult to make as Remus Lupin specifically thanks Snape when he makes it for him and also tells that he is very lucky that Snape is making this potion for him as most Potioneers would not agree to make it because of how difficult it is to make.