How to Support Someone Quitting Weed

If someone close to you has stopped smoking weed, the most useful thing you can know is that the person you are living with for the next fortnight is running a symptom, not a mood.

That distinction is most of this article. It changes what you take personally, what you offer, and what you say when they have a bad night.

What is actually happening to them

Cannabis withdrawal is a recognised diagnosis in the DSM-5. Its criteria include irritability, anger or aggression, nervousness or anxiety, sleep difficulty, decreased appetite, restlessness, depressed mood, and physical symptoms such as sweating, chills, tremor and headache.

Note how many of those are things that get read as a personality change. Irritable, restless, short-tempered, distant, not eating, not sleeping — from the outside that looks like someone who has become difficult. From the inside it is days three to five.

It is also common. A systematic review and meta-analysis in JAMA Network Open covering 47 studies and 23,518 participants found a cannabis withdrawal syndrome prevalence of 47% among people with regular or dependent use, rising to 54% in outpatient samples. About half of regular users get this when they stop, and most of them were told cannabis has no withdrawal.

The rough shape of the first three months is worth reading, because knowing which week they are in tells you what they need. Week one needs practical patience. Weeks two to four — flat, unrewarding, nothing visibly wrong — need company.

What actually helps

Ask instead of deciding. "What would actually help?" outperforms every plan you might design for them. Some people want distraction, some want to talk about it, some want it not mentioned at all. All three are legitimate and you cannot guess which.

Absorb week one without scoring it. They will be irritable and it will occasionally be aimed at you. It peaks on days two to four and eases. Saying "this is the withdrawal, it passes" quietly to yourself is more useful than saying it to them.

Occupy the hour. Almost every daily user has a specific window — usually evening — that was accounted for and now is not. Filling it with something you do together is the single most practical thing on this list, and what goes in that slot matters more than any conversation about motivation.

Feed them. Appetite loss in week one is normal and not eating makes irritability and low mood worse. Cooking is a concrete kindness that requires no discussion of feelings.

Be somewhere without it. If your shared social life ran on it, propose something else rather than waiting for them to. Being the person who has to opt out of every plan is exhausting and it is a common reason quits fail at week four.

Notice things that are not the streak. "You seem like you slept" lands better than "how many days is it now?" One is an observation; the other is a test.

What backfires

"It's not even addictive." Usually meant as reassurance and heard as a dismissal. Half of regular users get a withdrawal syndrome. Telling someone in the middle of one that it does not exist ends the conversation.

Daily progress checks. A well-meant "how's it going?" every evening converts their quit into your project, and it makes a slip something they have to confess rather than something they can tell you about.

Ultimatums. They tend to produce compliance rather than change, and the most common outcome is that use moves out of sight. If you have a specific worry, say the specific thing — "you have not slept properly in weeks and I am worried about it" — rather than issuing a condition.

Retrospective judgement. "You should have stopped years ago" may be true and is never useful. They are stopping now, which is the only timeframe available.

Treating a slip as proof. Most people who stop for good stop more than once. Reacting to one evening as though it invalidates three weeks is how you stop being told about the next one — and being told is the thing you actually want.

If they slip

The damage is rarely the slip. It is the twelve hours afterwards, when the whole attempt gets written off.

The most useful response is unremarkable: acknowledge it, do not perform disappointment, and ask what was happening beforehand. A slip is usually a trigger that had no plan attached — a specific hour, a specific person, a specific feeling. Helping them name it is worth more than any amount of encouragement.

Then carry on as though the attempt is still live, because it is.

If you are the one who still smokes

This is common and awkward and mostly unaddressed, so plainly: someone quitting in a house where it is still around is doing something considerably harder.

You do not have to stop. You can keep it out of shared space, not use it in front of them for the first few weeks, and not offer. Ask them what they need on this specifically — some people are fine and some find it makes the first month close to impossible, and the difference is not something you can predict.

When to push for professional help

Support is not treatment, and there are situations where the right move is to involve a clinician rather than to be more patient.

Encourage professional help if:

• Symptoms are severe, or are not improving after two weeks
• They are stopping other substances at the same time — particularly alcohol or benzodiazepines, where withdrawal carries risks cannabis withdrawal does not
• A mental health condition is worsening
• There are hallucinations, severe paranoia, or persistent vomiting
• They are pregnant
• There is any mention of self-harm

Therapy is also simply worth suggesting on its own merits. A systematic review and meta-analysis in Addiction covering 22 randomised trials and 3,304 participants found that cognitive behavioural therapy with motivational enhancement increased abstinence compared with inactive comparators, as did acceptance and commitment therapy — with the authors noting the certainty of evidence is low to very low. It is the best-supported option available and a reasonable thing to raise.

In the US, SAMHSA's National Helpline is free, confidential, and open 24/7 at 1-800-662-4357. It takes calls from family members, not only from the person using — which is worth knowing if you are trying to work out what to do and do not want to make it their problem to explain.

Looking after yourself

Living alongside someone in week one is genuinely draining, and "be patient" is not a plan.

You are allowed to say that a particular remark was unkind, to take an evening off, and to want this to be over. Support that runs on suppressed resentment does not last a month, and a month is roughly what this needs. Tell someone else what it is like. Keep something that is yours.

The short version

Week one is a symptom, not a personality change. Ask what helps rather than deciding. Fill the evening rather than the silence. React to a slip the way you would want one reacted to.

And when it stops being about getting through the day for them, it stops being about that for you too — which for most people arrives somewhere in the second month.

Sources

• American Psychiatric Association — DSM-5, cannabis withdrawal criteria
• Bahji et al., JAMA Network Open (2020) — Prevalence of Cannabis Withdrawal Symptoms Among People With Regular or Dependent Use of Cannabinoids
• Systematic review and meta-analysis of psychosocial interventions for cannabis use disorder, Addiction (2025)
• National Institute on Drug Abuse (NIDA) — Cannabis (Marijuana)
• SAMHSA — National Helpline
• How we write about this, and who reviews it