Anything is possible...if you have a narrowing of a zone (a stricture) or a strangulation or a twist anything that serves as a stopper can cause a problem...Try crushing them...
I just saw my rhumy who has decided that I should be crushing my anti inflamatories instead of swallowing them whole...I figure if I can crush them then I can crush vitamins.
Sharon
ps..I take all sorts of chewables: multivitamins, calcium+d, biotin, probiotics, collagene...