Chase mentions that he gave Harvey antidepressants to help him change his mind about refusing surgery, saying "it'll lighten him up soon enough". Most antidepressants can take 6-8 weeks to begin working, not soon enough to help him change his mind about receiving surgery.
When House gets a candy bar from the vending machine after "the date" the candy bar falls out of the wrapper when it clears the shelf.
So as to not have to pay for the appearance of name brand items (unless, of course, the sponsor PAYS for product placement), TV producers will "alter" the names of things like candy bars or cereal. In this episode, House gets a candy bar (labeled, "Chomp") from a machine - except as the machine dispenses it, the bar, itself SLIPS OUT OF THE WRAPPER before it finishes the cycle.
When House goes to the Pharmacy to collect the prescription for Viagra, a boom mic is clearly visible in the shot.