Board Thread:Naruto Discussions/@comment-26403664-20160228225013/@comment-681696-20160314204744

Uchiahmasters wrote:

Itachi might be able to use PS if he had EMS, and higher chakra reserves, and stronger chakra.

but as he is now, there's no way Itachi could use PS

If EMS is a requirement for PS then Itachi can't use it but as far as I am aware this has never been stated so my opinion based on Kakashi with Obito's MS using PS is that the EMS is not required to use PS.

Itachi's chakra reserves might be low but he is still capable of using powerful chakra exhaustive jutsu so in my opinion he would be able PS but only for a very short time.