11 oxo is among the mildest PHs out there.. it is also used to "bridge" into stronger things or to come off of harder things. it is one of the few that will not suppress you very bad. its far better at killing cortisol than it is attaching to a androgen receptor. OTC will be fine with this one.. but I would taper down the last two weeks allowing the androgen plasma levels to fall a bit. have a look at reversitol by iForce or Complete PCT by BBS
PCT would to recoop any shut down
I'm gonna chime in here with a second point. There definitely will be some active ingredients in the bottle, but 11oxo is expensive. What is actually in the bottle may be cheaper and harsher. Reputable companies are better than others, but there is still a risk. Best to protect yourself with real PCT.
Considering a 11 oxo stack... at 600mg a day... could an over the counter PCT be ok? And if so what should that look like?