Letro is more effective than armidex, and only a small dose (.25mg) is needed on cycle.

Also I've read that armidex and nolva are bad together because they sort of counter each other's effects. So if you were running armidex during cycle and nolva during PCT it might not be a good idea.

Someone else I'm sure can answer this better than I can.
But everything I've read favors letro over anything else for an on-cycle AI.[/QUOTE]

Yes but do we need anything to counter letro during pct if we take letro while on cycle?