Cannabis: Cutting Back and Getting Help

In studies of people getting help, using on fewer days went with better quality of life, and with less anxiety, low mood and poor sleep. Medication trials have often been judged failures on abstinence alone, even though reductions in use were frequent and went with feeling better.

• Fewer days of use is the change most consistently linked with feeling better
• In one study, cutting the amount used without cutting the number of days made no measurable difference to quality of life

An international guideline, updated in 2022, sets out how people who use cannabis can lower their risk of harm. Its main points are below.

• The later you start, the lower the risk; adolescence is the most vulnerable period
• Choose lower-THC products
• Avoid frequent or intensive use
• Choose a route other than smoking
• Take particular care if you are pregnant, driving, older, or have another health condition
• Use legal, regulated products where they are available

The best-supported approach combines cognitive-behavioral therapy with motivational enhancement, a counseling style that builds on your own reasons for change. The evidence is real and its certainty is low.

• Across 22 trials with 3,304 people, this combination made abstinence more likely than no active treatment
• More sessions work better than fewer: nine sessions outperformed two in a trial of 450 adults, and two outperformed waiting
• About seven in ten people complete a course
• Help reliably reduces how much people use; lasting abstinence is uncommon, as it is for other substances
• Rewards for verified abstinence may add to the effect

No medication is approved for cannabis use disorder or for cannabis withdrawal. A 2025 review of 37 trials concluded that every medication tested should still be considered experimental.

• No medication tested made stopping completely more likely
• In single trials, CBD and a prescription THC and CBD spray reduced how often people used; neither has been shown to help people stop
• N-acetylcysteine, a supplement sometimes suggested for quitting, did not help adults in a trial of 302 people
• A clinician may treat a specific symptom, such as poor sleep or nausea, for a short time

Digital programs have a modest effect. In young adults they reduced use by about seven days a month at three months. For digital treatment programs, the effect is small and fades.

• A self-guided program can support a change you have decided to make
• It is not a substitute for professional help when use has become hard to control
• BTYBD is education. It is not a treatment program

Some situations need a clinician, and a few need one urgently.

• Repeated vomiting: bouts of severe nausea and vomiting in a regular user, eased by hot showers or baths, point to cannabinoid hyperemesis syndrome. It stops when cannabis stops. Get medical care for repeated vomiting
• Psychosis: heavy use and stronger products are linked with higher odds of psychosis. Paranoia, or seeing or hearing things that are not there, needs urgent help
• Other conditions: with another mental health condition, or other substance use, plan any change with a clinician
• Pregnancy: obstetric guidance links cannabis use in pregnancy with preterm birth and low birth weight. Talk to your obstetric clinician

For family and partners, a structured approach called CRAFT has the best evidence. In an analysis of trials it brought about two-thirds of reluctant people into care, usually after the family member had attended four to six sessions.

• It got roughly three times as many people into care as referral to Al-Anon or Nar-Anon, and twice as many as another established family program
• Family members' own wellbeing improved whichever approach they used
• The evidence covers substance use in general, not cannabis specifically
• Look for a therapist trained in CRAFT

These US services are free and confidential, and open all day, every day. Details were checked on November 14, 2026.

• 988 Suicide & Crisis Lifeline: call or text 988, or chat at 988lifeline.org
• SAMHSA National Helpline: 1-800-662-4357, for referrals to local services, in English and Spanish
• FindTreatment.gov: SAMHSA's confidential search for providers near you
• In an emergency, call 911