Question about Items in Macros

Playing with controller so im trying to conserve as many buttons as possible and for the life of me I can't figure out how to get my macros to use an item (In this instance, Mega-Potion of Strength, or Hi-Potion of Strength).. What i have currently is..

/macroicon "Internal Release"
/ac "Internal Release"
/ac "Blood for Blood"

I've tried
/item "Mega-Potion of Strength" with and without target descriptors.. The only thing I can think of is maybe the HQ icon is screwing it up?

Anyone?.. Is this even possible to do?

As far as I remember, you can't do item macros.