How Do I Know If Someone I Love Has a Drug or Alcohol Addiction?

You can tell if someone you love has a drug or alcohol addiction by looking for a pattern of changes in their behaviour, mood, physical appearance, and daily life that cannot be easily explained by anything else. No single sign confirms addiction on its own, but when several of these changes appear together and persist over time, it is a strong indicator that something is seriously wrong.

Around 1 in 4 people in the UK are affected by someone else’s drug or alcohol use, whether that is a partner, parent, child, or close friend. Many of them spend months or even years questioning what they are seeing before they feel confident enough to name it as addiction.

If something feels wrong, it usually is. This page explains what to look for across different substances, why addiction is so hard to spot, and what to do if you think someone you love needs help.

If you need immediate guidance, call our team on 0203 955 7700, or read on to learn more.

Why Is It So Hard to Tell If Someone Has an Addiction?

It is hard to tell if someone has an addiction because addiction rarely looks the way most people expect it to. Many people with a serious drug or alcohol problem hold down jobs, keep up appearances, and function well enough on the surface that those closest to them end up questioning their own instincts rather than what they are seeing.

People who are dependent on drugs or alcohol often become skilled at managing how much others see. They minimise their use when challenged, find plausible explanations for the signs, and can be genuinely convincing in their denial, sometimes even to themselves. This is not dishonesty in the usual sense. It is one of the ways addiction sustains itself.

There is also the matter of what we expect addiction to look like. Most people picture someone who has lost everything and whose life has clearly fallen apart. But addiction exists on a spectrum, and many people are deeply dependent on a substance while still holding their lives together on the surface. If you are questioning whether someone you love has an addiction, that instinct is worth paying attention to rather than dismissing.

What Are the General Signs of Drug or Alcohol Addiction?

The general signs of drug or alcohol addiction are changes in behaviour, mood, physical appearance, and daily functioning that build up over time and cannot be easily explained by anything else. The pattern matters more than any single sign, and it is the combination and persistence of these changes that points toward addiction.

Behavioural changes are often the most noticeable early on. A person with an addiction tends to become more secretive, more defensive when asked about their habits, and more withdrawn from the people and activities that used to matter to them. They may become unreliable in ways that feel out of character, start cancelling plans, or show a gradual loss of interest in things they previously cared about.

Mood changes can be harder to pin down but are equally telling. Irritability, anxiety, sudden low mood, or personality shifts that seem tied to whether and when they have used are all worth noting. So are unexplained periods of unusual energy or confidence followed by significant crashes. Financially, addiction tends to cause problems that become harder to hide over time. Unexplained money troubles, borrowing, or vagueness about where money has gone are signs that a habit may be costing more than the person is letting on.

What Are the Signs of Addiction by Substance?

The signs of addiction vary depending on which substance is involved, and knowing what to look for with each one makes it easier to recognise what you are seeing. The table below covers the key signs across the most common substances.

How Does Addiction Change the Way Someone Behaves?

Addiction changes the way someone behaves by gradually making the substance the centre of their life, so that everything else, relationships, work, health, and personal values, starts to come second. The changes tend to happen slowly enough that they are easy to excuse or explain away until the pattern becomes impossible to ignore.

One of the most common shifts is in priorities. Things that used to matter start to slip. Work commitments are missed, family time reduces, plans are cancelled, and the person becomes increasingly hard to rely on in ways that feel out of character. There may be good days and bad days, which can make it easy to hold onto hope that things are improving when the overall direction is not.

Relationships suffer significantly in almost every case. A person with an addiction often becomes difficult to connect with, either because they are using and in a different state, or because they are preoccupied with using, managing the after effects, or thinking about when they can use next. Honest communication becomes harder, emotional closeness fades, and a growing distance can open up even in relationships that were previously strong.

What Is the Difference Between Heavy Use and Addiction?

The difference between heavy use and addiction is that addiction involves a loss of control, where the person cannot reliably stop or cut back even when they want to, and where stopping causes significant physical or psychological distress. Heavy use can cause real harm without the person being fully dependent, but sustained heavy use significantly raises the risk of dependence developing over time.

A useful question to ask is whether the person could choose to stop for a week and follow through on that. Someone who uses heavily but is not addicted can usually manage this, even if they find it uncomfortable. Someone who is addicted will find it extremely difficult or impossible, and the attempt will often end in relapse or be avoided altogether.

Another indicator is what happens when they cannot use. If going without the substance makes them noticeably unwell, anxious, or physically symptomatic, that points toward physical dependence. If they become preoccupied, irritable, and unable to focus on much else, that points toward psychological dependence. Both are forms of addiction and both need proper support to address.

What Should You Do If You Think Someone You Love Has an Addiction?

If you think someone you love has an addiction, the most important first step is to seek guidance from people who understand addiction before deciding how to act. How you approach the situation matters a great deal, and getting advice first can make the difference between a conversation that opens a door and one that closes it.

Talking to someone about their addiction is one of the hardest conversations you can have, and there is no perfect way to do it. Choosing a calm moment, speaking from your own experience rather than making accusations, and focusing on specific things you have seen rather than general character judgements tends to go better than a confrontational approach. Saying you are worried because of what you have noticed is very different from telling someone they have a problem and need to fix it.

It is also important to understand that you cannot force someone into recovery. People tend to engage with treatment when they reach a point of readiness, and pushing too hard too soon can cause them to shut down or pull away entirely. What you can do is make sure they know help is available, keep the door open, and make sure you have proper support in place for yourself while you wait.

Call our team on 0203 955 7700 for free, confidential advice on how to support someone you love.

How Do You Look After Yourself When Someone You Love Has an Addiction?

You look after yourself when someone you love has an addiction by recognising that your own wellbeing matters and that living alongside someone with an addiction takes a serious toll, even when you are not the one using. The emotional weight of worry, the unpredictability, and the strain on the relationship all have a real impact on your mental and physical health over time.

It is common for family members and partners to take on more and more, covering for the person, managing the consequences of their behaviour, and quietly putting their own needs last. This pattern can unintentionally make it easier for the addiction to continue by protecting the person from facing the full consequences of their use. Recognising this is not about blame. It is about understanding how addiction affects the whole family, not just the person using.

Getting support for yourself is not a betrayal of the person you love. Groups like Al-Anon and Nar-Anon exist specifically for family members and friends of people with addiction, and many people find them genuinely helpful both for practical guidance and for the reassurance that they are not alone. Speaking to a therapist or counsellor yourself is also worth considering, particularly if the situation has been going on for a long time.

Can Someone Recover from Addiction Without Wanting Help?

Lasting recovery from addiction without the person wanting help is very rare, and almost always requires the person to engage with treatment on some level of their own choosing. You cannot recover someone who is not ready, and repeatedly trying to do so tends to exhaust the people around them without producing lasting change.

That said, readiness for treatment is not always a fixed state, and the actions of people close to someone with an addiction do play a role in the process of becoming ready. Being consistent rather than repeatedly rescuing the person from the consequences of their use, making clear that help is available and that you are there when they are ready, and setting and keeping boundaries all contribute to the conditions in which change becomes more likely.

It is also worth being honest that some people need to reach their own low point before they are willing to accept help. Watching that happen is painful, and it is one of the reasons getting support for yourself, rather than putting your own life on hold while you wait, is so important.

What Treatment Options Are Available for Drug and Alcohol Addiction?

Treatment options for drug and alcohol addiction in the UK include medical detox, residential rehab, outpatient therapy, and structured aftercare programmes, with the right option depending on the substance, the severity of the addiction, and the person’s individual circumstances.

Medical detox is the starting point for substances that cause physical dependence, including alcohol, heroin, and GHB. It manages the process of stopping safely under clinical supervision and reduces the risk of serious complications. For substances where dependence is primarily psychological, such as cocaine or cannabis, detox is less medically complex but structured support is still important.

Residential rehab provides a fully immersive therapeutic environment away from the triggers and pressures of daily life, and is often the most effective option for more severe or longstanding addiction. Outpatient programmes allow treatment to happen alongside normal life and work for those with strong support at home and a less entrenched pattern of use. Aftercare, including ongoing counselling, peer support groups, and regular check-ins with a recovery support worker, plays a critical role in maintaining progress once primary treatment ends.

If you want to understand what the right level of treatment looks like for the person you are worried about, our team can talk you through the options based on their specific situation.

How Can Help4Addiction Support You and Your Family?

Help4Addiction helps families and loved ones across the UK find the right addiction treatment for their situation. We work with a wide network of trusted treatment providers covering all types of substance addiction, from alcohol and heroin to cocaine, cannabis, crack, ketamine, GHB, and more, and we match people with support that fits their needs and budget.

We know that calling on behalf of someone else can feel just as hard as calling for yourself, and that you may not be sure yet whether what you are seeing is serious enough to get in touch. It is. Our team provides free, confidential guidance with no judgement, and we will take the time to listen to what you are going through before making any recommendations.

Whether you are looking for treatment options for someone you love, need advice on how to start the conversation, or simply need to talk to someone who understands what living alongside addiction is like, we are here.

Call us today on 0203 955 7700 or get in touch online. You do not have to figure this out on your own.

Related Articles

• Is My Partner an Alcoholic? The Key Signs Explained
• Heroin Addiction Help, Treatment and Rehab
• Cocaine Addiction Help, Treatment and Rehab Options