I have a specific question I'd like to throw out. How soon do the symptoms of dopesickness come on, and what is the progression like? What would a person feel, and when (as in time after last dose).
In my research, it seems like the answer would not be so cut and dried, but would vary depending on the level of the person's addiction and other factors. So in that case, my question segues into another: What could addiction look like for a 19 year old female of light build around 5'3" tall? She has been addicted two or three years, has alienated her family and friends, and has resorted to prostitution to pay for her habit. What is a realistic level of use for her (how much heroin would she use, how much $ would she spend) and a realistic timeline of onset of withdrawal symptoms?
Thanks in advance.
P.S. I looked online, and needle exchanges are not legal in my state.
Progression of withdrawal depends on the specific opioid drug in question, but I can tell you what it's like for heroin.
Progression into withdrawal is very fast. In my experience it never seemed like any time at all between being high and beginning to feel sick.
I spent a year doing nothing but panhandling, and even less reputable stuff for heroin, so I can tell you what it was like for me.
As I said, for me I'd generally have a shot of heroin in the morning at about 6-7am and then go out with a friend of mine to try and make money. Generally I'd feel pretty good until about 1-3pm. Then things would start getting bad fast. In the winter I'd notice that the first symptom of withdrawal for me was suddenly noticing that I was starting to feel really REALLY cold. Heroin makes you feel warm and comfortable, so when you start getting sick it's pretty common to start feeling super cold.
Then my eyes would water and my nose would start running. All this would start happening very fast after I stopped feeling high, rarely much later than 3pm.
Apart from the cold, at first its pretty tolerable. But by around say, 7pm I'd start feeling pretty sick. Finding it impossible to get comfortable. Not so sick I was on the floor throwing up sick. But definitely unfun and uncomfortable.
For me restless leg syndrome was the worst symptom. You can Google it but while it's called restless leg syndrome, for withdrawal it's more restless everything syndrome. It feels like you just can't stay still. Everything feels uncomfortable. Moving helps slightly, but not much.
Usually by 7-9pm I'd have enough money to have another shot. Most IV heroin addicts would probably have more like 3 or 4 shots throughout the day, but I generally had 2 big ones. One morning one night. Maybe a third in the middle of the day if I had enough money.
If you don't get heroin or some other opioid though, withdrawal progresses very quickly. Feeling achey, throwing up, it's just... Fucking... Awful.
Sometimes you read and some doctors will tell you that withdrawal is like a bad case of the flu. Personally I think that's bullshit. You don't get restless leg syndrome from the flu which means you can't sit still and can't get any rest. You don't get insomnia from the flu.
Withdrawel makes it nearly impossible to sleep and rest.
And knowing you're gonna be in Withdrawel if you don't do something to get money, and fast. Fucks with your mind. It's super easy to start telling yourself that getting money is your first priority. And any harm you do to others to get it can be made up for later.
You don't prostitute yourself until you see literally no other choices. In my experience, it's often not (and wasn't for me) that you ever decide to prostitute yourself. It tends to happen because somewhere along the line, the option of trading sex for drugs, or sex for money for drugs gets presented to you, and once you've done it the first time, it's so so much easier to do it again the next time.
When you're in Withdrawel, often you'll feel like you'll do almost anything to make it stop. And the temptation of there being something you can do that will mean you can go and get high inside of an hour can be overpowering.
How much money you spend is going to vary considerably. For me it'd have been well over a couple hundred dollars a day. Basically as much money as I could make.
Every minute, of every day, in service to heroin. You don't pawn all your stuff or steal from friends and family because you don't care about hurting them. You do it because Withdrawel causes you to lie to yourself that you can fix it later. Heroin acts fast, and causes withdrawal fast after the high ends. Which does an insidiously excellent job of training your mind to feel overwhelming panic and dread at the thought of not being able to get more heroin.
Heroin addiction takes over every part of your life through a million small steps and a million small rationalizations. Until one day you wake up and realize, this is your life now. Heroin being the first thing on your mind after you wake up, being the goal of every action taken throughout the day, all day, every day.
Not everyone's experience with heroin addiction is going to be the same. But there are similarities, and this is what it was like for me in a situation similar to what you described for your character.
EDIT: Just a quick comment about the movie trainspotting. While it certainly gets some things right (though I'd say requiem for a dream is better), one thing it gets wrong is describing what heroin feels like. It's nothing like an orgasm. It's more like a much better version of waking up in a nice warm bed half asleep without a worry in the world. A strong sensation of being warm, safe, and just good.
But addiction not because the high is that great, but because the withdrawal is THAT HORRIBLE. Heroin does feel good, but it's withdrawal that makes addicts do the shitty things addicts do.