Wow Kitsune that's horrible. I'm so sorry you're brother died... D':
I'm surprised you'd want to talk about it, especially on the site you visit to escape things like this.
Cough medicine overdose=Bad for health and gets you high
And since you dont know how the **** you overdose, here is a detailed tutorial:
First, get yourself some cough medicine,
Then, you open it up
Poor some in a cup
Drink
Repeat step number 3/4 a few times,
Tada, you overdosed.