Mr. Roarke calls the man's heart pills "glycerin tablets". Glycerin is an inert substance, a placebo and sugar replacement for dieters, often used in moisturizers for its water retention properties. The accurate word which the scriptwriters should have used is "nitroglycerin".
Mr. Roarke tells the man that his wife found him passed out "on the stairs"; but the very previous scene, he had fainted in the living room, next to the couch, nowhere near stairs.