I shut down worse with heavy androgen use.....tren and test. Those who are prog senetive may get it bad...i dont even get deca dick. NPP, awsome compound.
Run your deca 400mg a week, minimum 10 weeks, no need to taper up or down (tapering down is useless...you are shut down until its all gone 400mg or 200mg the last shot, it doesnt matter).
PCT with letro and clomid. If you dont like it, dont run it again. Dont be scared away by people who have bad experiences with it, not everybody has the bad experience with nandrolones.