primo, var, and winny, will potentially shut you down too if you take them long enough and in high doses....
in fact, ive seen one study showing that 15mg var per day for 3 days lowered test levels significantly... i dont have the study at hand but its been posted here on elite a year back.. im sure an extensive search will yield something.
now keep in mind that var/winny/primo will lower natural test production, but not as significantly as with the 'stronger' anabolics like test/deca/dbol/anadrol..... thats why recovery from 'milder' anabolics like winny/primo/var is easier.
so before answering your questions, its probably best if you specify exact doses and duration of the planned cycle.
last...
better safe than sorry.
for that reason, i always run hcg and nolvadex after each cycle.