Book vs Film: Romeo and Juliet

I have seen a lot of differences in the film between the book.

1- The dialogues in the book are more "mediaevals" and harder than the film.

2- In the film, the families use guns, and in the book they use swords and daggers.

3- The friar in the book was a priest, and in the film was a apothecary or herbologist.

4- In the book the city have the name : Verona. And in the film the name was Verona Beach.

5- In the film the Prince was the boss of the department of police, and in the book was the king of Verona, and was older than the film.

6- In the book the people of the party have customs and masks, in the film they have only customs.

7- In the film, Romeo and his friends take drugs but no in the book.