I have said and read “Plan B” many times in my life, almost never in connection with an abortion drug. Searching on Google, “Plan B” is more connected with the musician and politicans’ speeches.
"Plan B morning after-pill" is the first page of hits on Google for me, and definitely is the first thing that popped into my head. Perhaps its a region-specific thing, though.
Yeah, US-centric, I wouldn’t have thought of that. My search results page for Plan B has a musician, a film, climate change advocacy... but the ads are all for pills.