StopMacro() alternative for macro?

Is there any alternative for StopMacro() since its protected function? (excluding the /stopmacro obviously)

There doesn't seem to be anything like else. Most likely to enforce the limitations that /stopmacro has.

then is there some way to track if my character is drinking like " /use [stealth]spell " for stealth to prevent it using drink again and again?

Macro conditionals:
http://wow.gamepedia.com/Macro_conditionals

The list does not seem to contain anything you could use for that.