Well, I'm pretty sure Vivitrol is given monthly, and from what little research Iv'e done, it actually lasts at least 45 days before the effect begins to wear off. Some patients have reported as much as 30 days. The big risk is that the patient will OD while trying to get high while on Vivitrol.
The one thing that bothers me about all of this is that the OP's husband sounds like a real "jerk", and I don't think he is one. I think he is hurting and confused, and by avoiding her son, he avoids stirring up internal turmoil and pain.
Unfortunately, he also is "unable" to talk about his feelings. and OP has allowed him to take a dominant role in the marriage.
THAT is really what this post is about, not a vacation and who goes on it.
