You Do Need power plug adapter while traveling from Italy to Antigua and Barbuda.

Here is Why You Need An Adapter

The outlet and plug type used in Antigua and Barbuda are A and B and in Italy are C, F and L. This is how they look like.

Italy

In Italy, outlets of type C, F and L are in use.

Type C

Type F

Type L

Antigua and Barbuda

In Antigua and Barbuda, outlets of type A and B are in use.

Type A

Type B