I've just tried this:
/macro H "targetname Punk$$powexec_name Alkaloid"
which needs a double tap on the macro button to fire alkaloid correctly but it does work (sort of), you'd need to rename all your minions uniquely etc. I daresay some of the macro gurus out there will be more help 
ttfn
Bob
Actually, you can use...
/bind numpad1 "powexecname Alkaloid$$petselect 0"
/bind numpad2 "powexecname Alkaloid$$petselect 1"
/bind numpad3 "powexecname Alkaloid$$petselect 2"
/bind numpad4 "powexecname Alkaloid$$petselect 3"
/bind numpad5 "powexecname Alkaloid$$petselect 4"
/bind numpad6 "powexecname Alkaloid$$petselect 5"
... which will on double-tap heal pets in the order that they appear in the pet window
To put it simply...i'm not so good at complex binds/macros, i know enough to get by and thats about it.
I wanna know is it possible to set a Macro so that i can target one of my minions and heal with Alkaloid with a single press of the button, in a hope to set up a heal macro for each one for quicker healing.
If so, how? and if not...any suggestions on other methods.