Hi I'm currently doing a 14 night inpatient straight heroin detox of which I'm on the last couple of days. I've been trying to stop taking everything and got my lofexidine right down to 0.8mg day but on night 12 and really struggling with stomach / diarrhea so had to take some loperamide, is still safe to take my first Naltraxone dose tomorrow? I know it's not an opiate but it is related and I'm not sure how true it not crossing the bbb is Thanks.