PG-13 (but just barely)
There's plenty of violent death in 1st Kings: a few battles, various political assassinations, Elijah's slaughter of the 850 priests of Baal, and one lion mauling. Nothing too graphic, though. As far as sex goes, it's really not too steamy, particularly considering the whole 1,000-woman-harem thing Solomon has going on. It's barely mentioned, really. The steamiest details might be Abishag spooning 24/7 with mummified old King David, but it's stated explicitly that there's no hanky-panky involved. Some ritualistic temple prostitutes are alluded to, but nothing more. Drugs-wise, it's squeaky clean, other than Elah getting drunk.