Not sure on the chronology of The Knick and Wolf. Even if one debuted before the other it could have been in the script even before that. There are no original ideas in Hollywood these days.
Or medicine. Coke's been used as a topical anesthetic since long before The Knick is set. Hell, if they hadn't plastered the back of General Grant's cancer-ridden throat with coke, Mark Twain could never have coaxed that memoir out of him.