In the special episode of the TV series Sherlock titled The Abominable Bride, Sherlock Holmes and his brother keep talking about a list. What is this list and what is its reference?
Its a list of all the drugs Sherlock has taken so that if he's in trouble Mycroft can help him.
I'm guessing it's so that, if Sherlock is overdosing (and he can't tell), Mycroft would be able to tell the doctors what he took so that they can help him.
Obviously none of you are users. If you have a serious habit, you need to keep track of what, when and how much you took. Not only for their agreement, but some drugs make you black out not realizing how much you took. Leading to an overdose. Sherlock mixes multi drug cocktails. In the case of an OD you have to know what they took to administer treatment.