Naltrexone Question

[erock80]

So I'm about to start the 3rd week of a 16 week cycle. I was going to begin running HCG 500iu every 3 days starting my fourth week til the end but I got a hold of some Naltrexone and was wondering if I can start running it 5mg a week until the end instead of the HCG. I am starting to show signs of atrophy and was wondering since I didn't start with the Naltrexone from the beginning will it be useless to start now? Does it reverse the shutdown or just aid in the atrophy never happening?