Look, I just typed a long post only to find out that the log was closed, so I'm going to place it here for you. I hope it helps.
"
You said that everyone was just looking for someone to bash, that isn't what's going on here. Ill tell you a few things:
1. I'm going to be the one to tell you that people like your boyfriend who have clearly not reached their natural limit and are trying to throw ridiculous amounts of juice in their system at a young age in order to get huge are a very sensitive subject on this board. Even bringing them up is going to stir up emotions about how society views merit bads like steroids because people like your man here are the ones who give it the image it has.......which has ramifications for respectable users.
2. I understand he is a first time user, and I know what it is like to have your mind so set on something that there is no way to talk him out of it. But the fact that he "did his research" is not enough. He is taking way too much for a first cycle when he shouldnt even be cycling in the first place.....and that is never a good combination.
Some of the things you have told us that he said (like judging the potency of his cycle in pound gains.....which is not possible) shows us that he is still at least partially ignorant on the subject, and trying to protect someone who does not want to be protected is very irrtating (thus the increased irritability of our members). My guess is that he will run it for a week or two, start getting bad side effects, get scared like a lot of first time users, and ditch it 2 weeks in.
Now that the perceived "rage" is taken care of, I'll respectfully answer your questions:
Can you stop him?
Probably not without extreme measures (such as disposing of it yourself and telling people that he doesn't want to know). I wouldn't recommend it. It could hurt your relationship and it may not even work.
Will him juicing hurt your relationship?
I'm with bloke on this one; no. Even with the Test-E he may get deca dick, and be impotent (maybe for a long time if he is only taking clomid for PCT....), but as far as roid rage goes, he shouldn't get any. It has been my experience that while what musclemom has said can be true of people with already high testosterone levels, I am doubtful that your man is full of natural test if he is struggling to break 150 lbs at almost 6 feet tall. Agression has plenty of other factors other than testosterone, and excess won't make him more agressive in this case IMO.
Will he hurt himself?
Judging by what you have told us, and if he continues with his plan; yes. Irreparably? Probably to some degree. Like people have said, Deca is tough to come back from, especially when you don't know what you're doing. And frankly, so is d-bol. He will get side effects, even if he is taking an AI (like nolvadex), and at these doses for a young guy, they will be bad.
My advice is to just let it happen. Try to manipulate here and there, but subtley. If you don't tell him that he looks good, if you don't act any different than you did before he started juicing, then that plants a seed. Even if you throw in some subtle comments about his side effects (like acne, deca dick, etc.) it will make him think twice.
He is 20 years old. He is a boy. Chances are, he is doing this to impress someone other than himself, and chances are that person is probably you. This leaves you with the most power to prevent it in the future.
Don't forbid it, let it happen, and use your influence to play on his insecurity. That's my two cents."