My doctor preseribed it because I have been getting hives for the past week or two, so rather than find out what I am allergic to we are just treating the hives (ugh). Anyway, what should I expect? A...
Yes, just make sure you follow the dose guidelines for both.
I wouldn't. Personally promethazine knocks me flat, and I take half of a 25 mg tablet. I've taken it with vicodin before and literally passed out. Of course it all depends on your reactions, but again, it's not something I'd advise.
Yeah, just don't take a lot of ibuprofen unless you have a headache. It's not much good for anything else and it's hard on the liver. As far as interactions between the three chemicals, none exist.