Introduction
This is a question about duty, not about strategy. Not would it help me to tell, but does someone have a claim on this information that I am wronging them by not honouring?
The answer is yes, sometimes. The list is short, it's specific, and it is dramatically shorter than the list of people you probably feel guilty about.
The Principle That Sorts It
One test does most of the work.
Someone has a claim on this information when they are making a decision whose consequences fall on them, and this information would change that decision.
That's it. Not how close they are. Not how much they love you. Not how hurt they'd be to learn later. Whether they are, right now, choosing something on the basis of a picture that is materially incomplete.
Curiosity generates no obligation. Affection generates no obligation. Being someone's parent does not, by itself, generate a claim on their adult child's medical history.
Where the Obligation Clearly Exists
Medical providers. Not a moral obligation so much as a practical necessity, but it is genuine. Substance use affects drug interactions, anaesthesia, dosing, what's likely to be wrong with you, and whether the treatment you're given will harm you. Concealing it from a physician can kill you. Tell them, even knowing they may treat you worse for it — and they sometimes do.
A partner making a life decision. Someone deciding whether to marry you, have children with you, buy a house with you, or move across the country for you is making a choice with consequences that land on them. A significant addiction history is material to that choice. Withholding it doesn't merely risk their anger later; it deprives them of the ability to consent to the life they're choosing.
Where your use directly endangers others. Driving. Caring for children. Operating machinery. A safety-sensitive job. Here the obligation runs not to a relationship but to the people at risk, and it isn't negotiable.
Where you've made a specific commitment. A court, a treatment agreement, a professional monitoring program, a promise made explicitly to a partner. Having agreed, you're bound by the agreement.
Where It Clearly Doesn't
Casual acquaintances, colleagues, neighbours, extended family. No claim. None. However curious, however wounded they'd be to be the last to know.
Employers, in most circumstances. Your legal position varies enormously by jurisdiction, industry, and role, and this article can't tell you what it is. But a general moral obligation to disclose your health history to an employer does not exist. Safety-sensitive roles are a genuine exception, and legal requirements are their own category. Get advice rather than acting from guilt.
Early dating. No claim yet, because no decision of consequence is being made. This changes as it becomes serious, and the transition is somewhere around the point where they're planning around you.
People who want to know so they can decide what they think of you. This is the largest category and it produces the most guilt. There is no duty to supply material for someone's judgment.
The Hardest Case: Your Children
It doesn't fit the framework cleanly, and pretending otherwise would be evasive.
Children are affected by your addiction whether or not they are told, they have no capacity to consent to anything, and the information may be beyond their ability to hold. The claim they have is real, and the form it should take depends entirely on age, on what they already witnessed, and on what they've been told to explain it.
What can be said generally: children construct explanations in the absence of information, and the explanation they construct is almost always that it was their fault. That is the specific harm of silence in this case, and it argues for something age-appropriate being said rather than nothing.
This deserves professional guidance rather than an internet article, and it is worth getting.
Guilt Is Not a Reliable Guide
The reason this needs a framework rather than instinct.
Guilt in recovery is frequently indiscriminate. It generates a sense of obligation toward everyone you have ever deceived, which — for a person who deceived nearly everyone — produces an unpayable and infinite debt.
But the fact that you once lied to someone does not create a standing duty to disclose to them now. A colleague you told a false story to in 2019 is not owed a confession in 2026. That impulse is guilt seeking discharge, and discharging it at someone else's expense is not repair.
Some Disclosures Harm the Recipient
Worth stating firmly, because it's counterintuitive.
Telling someone can be an act of aggression dressed as honesty. Confessing to a person who has moved on, in order to relieve yourself. Telling an elderly parent something that will frighten them for the rest of their life and about which they can do nothing. Contacting someone who has explicitly asked not to hear from you.
If the disclosure primarily benefits you and primarily costs them, it is not an obligation being met. It is a burden being transferred, and the fact that it's true doesn't make it right.
The Question of Timing
Obligation includes when.
A partner has a claim before they make the decision, not after. Which means the duty is triggered by their choice, not by your comfort. Waiting until after they've married you and then disclosing does not satisfy the obligation; it defeats it, because the entire point was to inform a decision that has now been made.
The practical rule: disclose before someone commits, not after.
The Bottom Line
You owe this to doctors, to a partner making a life decision, to people your use directly endangers, and to anyone you specifically promised. That's most of the list. You do not owe it to the curious, the hurt, the extended family, or a colleague you lied to years ago — and the guilt telling you otherwise is not evidence of a duty. Some disclosures help nobody but you. The test is always the same: is someone choosing something, right now, on a picture that is materially incomplete?