Parents' Guide: When Your Child Uses Cannabis

Few situations unsettle parents as much as discovering that their child uses cannabis. Fear, anger, disappointment and helplessness often merge into an emotional cocktail that makes rational action difficult. Yet composed reactions are precisely what matters now – because how parents communicate and act in this situation has a significant influence on whether their child passes through consumption as a temporary phase or slides into a problematic pattern of use. This guide offers parents well-founded, practical guidance – from recognizing initial signs through conducting conversations to professional support services.

## Reality Check: How Common Is Cannabis Among Young People?

Before parents panic, a sober look at the numbers helps. According to the 2024 BZgA study (Federal Centre for Health Education), approximately 10 percent of 12- to 17-year-olds have tried cannabis at least once in their lives. Among 18- to 25-year-olds, the figure is around 46 percent. Regular use (defined as more than ten times in the past 12 months) stands at approximately 2 percent among 12- to 17-year-olds and approximately 8 percent among 18- to 25-year-olds.

These figures illustrate two important points. First: one-time or occasional experimental use is statistically common and in the vast majority of cases does not lead to problematic consumption. Most young people who try cannabis do not develop an addiction problem. Second: nevertheless, the risk is real – particularly with early onset, regular consumption and certain risk factors such as pre-existing mental health conditions or family history of addiction.

## Recognizing Signs: What Parents Should Watch For

The signs of cannabis use can be subtle and partly overlap with normal pubescent behavioural changes. A single conspicuous feature means nothing on its own – only the convergence of several signs over a longer period should make parents attentive.

### Physical Signs

Reddened or glassy eyes are one of the most noticeable signs of acute cannabis use. THC dilates blood vessels in the eyes, leading to a characteristic redness. Some young people use eye drops to conceal this – conspicuous consumption of eye drops can therefore itself be an indirect sign.

Changed appetite, particularly sudden cravings (the so-called munchies), is a typical accompanying symptom. If your child regularly raids the fridge in the evening and consumes large amounts of sweets or snacks, this can be an indicator.

Tiredness and lethargy, especially in the morning or after school, may point to cannabis use the previous evening. THC impairs sleep architecture and can lead to non-restorative sleep despite long sleeping times.

Changed body odour – a sweet-herbaceous smell on clothes, hair or in the room – is a relatively clear indicator. Many young people try to mask the smell with room spray, incense or heavy perfume.

### Behavioural Changes

Withdrawal from the family and the existing circle of friends in favour of new, unknown peers is a common pattern. If your child suddenly breaks contact with long-standing friends and instead spends time with a new group whose members they do not want to introduce, attention is warranted.

Declining school performance is one of the best-documented correlates of regular cannabis use among young people. Falling grades, missing homework, truancy and disinterest in school subjects that were previously enjoyed can be warning signals.

Changed sleep patterns – particularly falling asleep very late and difficulty getting up – fit the typical consumption pattern: evening use, late falling asleep, morning lethargy.

Mood swings, irritability and loss of motivation can be symptoms of both pubescent development and consequences of regular cannabis use. The distinction is difficult – a sudden, marked shift in mood is more telling than gradual changes.

Secrecy and lying about whereabouts, new expenditures without apparent purpose and the discovery of unfamiliar paraphernalia (papers, filters, grinders, small bags) are direct indicators.

### Paraphernalia and Discoveries

Typical paraphernalia that indicate cannabis use: cigarette papers (long or wide papers), activated carbon filters or cardboard filter tips, grinders (herb mills for shredding), small plastic bags or containers with herbal content, vaporizers or e-cigarette-like devices and eye drops.

### What the Signs Do Not Mean

Important: the presence of individual signs does not prove cannabis use. Reddened eyes may come from allergies, tiredness from lack of sleep, mood swings from puberty. Parents should take signs seriously but not rush to judgment. The next step is always: seek a conversation – not search the room.

## The Conversation: How to Talk to Your Child

The conversation about cannabis is probably the most important thing you can do as a parent. It is simultaneously the most difficult. Many parents instinctively make mistakes that worsen rather than improve communication. Here are the key principles.

### Choosing the Right Moment

Do not have the conversation in the heat of the moment. If you have just found a bag in your child's room, take time to process your emotions before seeking the conversation. A conversation driven by anger or panic is almost never productive.

Choose a quiet, private moment – not in front of siblings, not at dinner, not in passing. Announce the conversation: "I'd like to talk to you about something important. When suits you?" This gives your child the opportunity to prepare mentally and signals respect.

Do not have the conversation when your child is obviously under the influence. No objective conversation is possible in that state.

### The Right Attitude: Curiosity Instead of Interrogation

The biggest mistake parents can make is to conduct the conversation as an interrogation. Questions like "Are you taking drugs?", "How long has this been going on?" and "Who gave it to you?" create defensiveness, not openness. Instead, begin with I-messages: "I've noticed that you've changed lately, and I'm worried." "I'd like to understand what's going on in your life right now." "I want you to know that I'm here for you – no matter what."

Ask open questions: "Tell me how you're doing." "What's fun for you right now, what's stressing you?" "What's your view on cannabis?" Listen actively: let your child finish speaking, repeat what you heard in your own words (paraphrasing), ask clarifying questions instead of judging.

### Honesty and Objectivity

Be honest about your feelings: "I'm afraid this is harming you." But avoid dramatizations and exaggerations. Statements like "You're ruining your life" or "This is the beginning of the end" are counterproductive – young people recognize exaggerations immediately and switch off.

Inform yourself beforehand about the actual risks and effects of cannabis. Misinformation permanently undermines your credibility. If you don't know something, say so openly: "I'm not sure about that – let's find out together."

### Dos and Don'ts Overview

**Do:** Listen before you speak. Use I-messages. Name concrete observations (rather than assumptions). Show empathy. Respect your child's autonomy. Ask questions rather than make accusations. Be honest about your own experiences (if you have tried cannabis yourself). Seek information together.

**Don't:** Shout, threaten or punish. Secretly search the room. Embarrass your child in front of siblings or friends. Issue ultimatums you cannot enforce. Moralize or preach. Draw comparisons with other young people. Downplay the consumption to avoid conflict. Ignore the topic hoping it will resolve itself.

## Setting Boundaries: Clear, Loving and Consistent

Understanding and empathy do not mean accepting everything. Parents have the right and the duty to set boundaries – especially for minors whose brains are still developing.

### Establishing Clear Rules

Formulate rules together with your child. Unilaterally imposed prohibitions generate resistance. Rules that are jointly developed have higher acceptance. Possible rules may include: "No cannabis on weekdays / school days." "No consumption in our home." "You don't come home high." "You never ride a bicycle or drive under the influence."

### Agreeing on Consequences

Rules without consequences are ineffective. Agree in advance what happens when rules are broken – and follow through. Consequences should be proportionate (no contact prohibition because of one joint), logically connected (fewer freedoms when trust has been abused) and consistently enforced (inconsistent parents lose credibility).

### The Line Between Experimental and Problematic Use

Not all cannabis use is equally problematic. Parents should learn to distinguish between different consumption patterns.

Experimental use (once or twice): Statistically normal for young people. No reason for panic but an occasion for an informative conversation. Risk of long-term harm: very low.

Occasional use (monthly, in social situations): Attention required. Conversation about risks and rules. Regular check-ins: "How are you doing with that?"

Regular use (weekly or more often): Red warning signal. Professional counselling recommended. Possible developmental impairment. Clear boundaries and close accompaniment necessary.

Daily use: Urgent action required. Seek professional help. Possible cannabis use disorder. Investigate accompanying issues (depression, anxiety, trauma).

## Offering Support Without Controlling

The balancing act between care and overcontrol is one of the greatest challenges for parents. Too much control – searching rooms, checking phones, monitoring every step – destroys the relationship of trust and drives young people further into secret consumption. Too little attention signals disinterest and leaves problematic consumption undetected.

### What You Can Do

Stay in conversation. This does not mean daily interrogations but regular, casual moments of connection: shared meals, walks, car rides. Show genuine interest in your child's life – not just the cannabis topic. Ask about friends, school, hobbies, worries. The more you know about your child's overall life, the better you can assess what role cannabis plays in it.

Offer alternatives. Many young people use cannabis for stress management, relaxation or against boredom. If you recognize these functions, you can suggest alternatives: sport, music, creative hobbies, meditation or simply more shared time. You cannot force anything – but you can offer.

Strengthen your child's self-esteem. Young people with stable self-esteem and good social relationships are less likely to consume problematically. Praise, recognition and emotional availability are the strongest protective factors parents can offer.

### What You Should Avoid

Avoid making cannabis the only topic in your relationship. If every conversation ends up about getting high, your child will stop talking to you altogether.

Avoid punishments unrelated to the consumption (e.g. withdrawing pocket money because of a joint). Such penalties generate defiance, not insight.

Avoid embarrassing your child in front of others – siblings, relatives, teachers. Cannabis use is a private matter between you and your child. Only widen the circle of those who know when there are professional reasons.

## Age-Appropriate Education: Prevention Starts Early

The best prevention begins long before the topic of cannabis becomes acute. Children and young people who are educated about substances early, factually and in an age-appropriate manner make more reflective decisions.

### Ages 8 to 11: Basics

At this age, it is not yet about cannabis specifically but about a basic understanding that substances exist that change the body and thinking. Children can learn that medicines can help but also have side effects, that some substances are dangerous for children, and that it is okay to say no when someone offers them something they do not know.

### Ages 12 to 14: More Specific Information

In puberty, the topic becomes more concrete. Young people hear about cannabis from classmates and form initial opinions. Now is the right time for factual information: what cannabis is and how it works, why the developing brain is particularly sensitive, that it is legal but not harmless (the analogy to alcohol helps), and that you are approachable when questions or situations arise.

### Ages 15 to 17: Building Risk Competence

At this age, the likelihood of young people coming into contact with cannabis is highest. Prevention now means not deterrence but risk competence: How do I recognize problematic consumption in myself? What consumption rules reduce risk (safer-use principles)? Who can I turn to if I need help? How do I say no in a group without losing face?

## Professional Help: When and Where

Not every situation can be resolved within the family. Professional help is recommended when consumption occurs regularly or daily, when you observe behavioural changes that go beyond normal pubescent behaviour, when you suspect psychological problems behind the consumption (depression, anxiety, trauma), when conversations between you keep escalating, and when your child expresses a wish to stop but cannot.

### Addiction Counselling Centres

Addiction counselling centres offer free, anonymous advice for affected individuals and family members. The counsellors are trained in working with young people and can provide an initial assessment of the situation. You can find addiction counselling centres through the database of the German Centre for Addiction Issues (DHS): www.suchthilfeverzeichnis.de. The counselling is subject to confidentiality – nothing is reported to schools, employers or authorities.

### Child and Adolescent Psychotherapy

If psychological problems underlie the cannabis use – depression, anxiety disorder, ADHD, trauma-related disorder – psychotherapeutic treatment is key. Waiting times for therapy places can be long (3 to 12 months). Interim services are offered by psychological counselling centres and the telephone counselling service (0800 111 0 111).

### Family Counselling

If the child's cannabis use burdens the family as a whole – conflicts between parents, tensions with siblings, helplessness – family counselling can help. Parenting counselling centres offer this service free of charge.

### Emergency Contacts

In acute crisis: Telephone counselling service (0800 111 0 111 or 0800 111 0 222, 24/7, free). Children and young people's helpline (Nummer gegen Kummer): 116 111, Mon–Sat 2–8 pm. Parents' helpline (Nummer gegen Kummer): 0800 111 0 550, Mon–Fri 9 am–5 pm, Tue and Thu until 7 pm. BZgA addiction hotline: 0221 892031, Mon–Thu 10 am–10 pm, Fri–Sun 10 am–6 pm.

## When Your Child Is an Adult

With the 18th birthday, the situation changes fundamentally: cannabis consumption is legal for adults, and parental responsibility formally ends. Yet parents naturally remain important reference persons. If your adult child consumes, remember: you can no longer prohibit – but you can continue to express your opinion, voice concerns and offer support. Respect the autonomy of your adult child, even if you reject the consumption. Keep the channels of communication open – that is more important than being right. Set boundaries in your own sphere: "No consumption in our home" is a legitimate concern even towards adult children.

## Self-Care for Parents

Knowing about your own child's cannabis use is emotionally taxing. Many parents develop feelings of guilt, anxiety about the future or needs for control that impair their own mental health. Take your own feelings seriously. Talk to other parents – you are not alone. Relatives' groups at addiction counselling centres offer a protected setting. Seek professional support yourself if you feel overwhelmed. Remember: you are not to blame for your child's consumption. Cannabis use among young people has many causes – the vast majority have nothing to do with parental failure.

## Summary: The Ten Most Important Recommendations

1. Stay calm. One-time experimental use is not the end of the world. 2. Educate yourself factually about cannabis – knowledge replaces fear. 3. Seek the conversation – openly, respectfully, without accusations. 4. Listen before you speak. Understand your child's perspective. 5. Set clear, jointly developed rules – and stick to them. 6. Distinguish between experimental use and problematic use. 7. Offer alternatives and strengthen your child's self-esteem. 8. Begin age-appropriate education long before cannabis becomes a topic. 9. Seek professional help when consumption becomes regular or psychological problems exist. 10. Do not forget yourself – parents need support too.