H1B stamped in May. Amendement applied now. Is interview required ??

I got h1b stamped in may 2012. Now my project is changed i.e. new client new location. Company is filing for amendment.

My query is

Is there premium processing also in Amendment? how long it takes to get amendment done?

Do I have to attend the visa stamping interview again with the consulate?

I am not sure about the premium processing, but you don’t need to go for stamping again after the new petition gets approved. You can use the old visa stamp as long as it is still valid.