Can an open bottle of B -Vitamins cause intense odor to permeate clothing, furniture, linens, etc? ?

Vitamins B did not cause this odor.I can't say what it could possibly be but I don't think that would be it unless something drastic is wrong with them.In any case throw them out.Frebreeze will fix the odor and maybe hang clothes out doors.Or take them to a dry cleaners they can do them.