Drug use disorder is a chronic condition that affects millions of people, altering how the brain works and making it extremely difficult to stop using substances even when they cause serious harm. Understanding what to expect with this condition and knowing that recovery is possible with proper support can make a significant difference for patients and their loved ones.

Prognosis

Understanding what lies ahead when someone has drug use disorder can feel overwhelming, but having realistic information helps both patients and families prepare for the journey. Drug use disorder is a chronic disease, which means it is a long-lasting condition that requires ongoing management rather than a quick fix. This can be difficult to accept, but it’s important to know that chronic does not mean hopeless.^[1]

Because drug use disorder affects the brain in lasting ways, it is considered a relapsing disease. This means that people who are in recovery may face the risk of using drugs again, even after months or years of not taking them. The brain changes that happen with repeated drug use can persist for a long time, making the urge to use drugs return during times of stress or when exposed to certain triggers.^[1]

However, the outlook is not bleak. Drug use disorder is a treatable condition, and recovery is possible for everyone. While there is no cure that completely eliminates the disorder, effective treatments exist that help people manage their condition and lead healthy, fulfilling lives. Many people achieve long periods of recovery and successfully rebuild their relationships, careers, and health. The key is getting the right support at the right time and understanding that setbacks along the way are part of the process, not a sign of failure.^[2]

In 2022, more than one in six Americans aged 12 or older experienced a substance use disorder, showing how common this condition is across all walks of life. The condition can range from mild to moderate to severe, and the severity can change over time with treatment and support.^[6]

Natural Progression Without Treatment

When drug use disorder goes untreated, the condition typically worsens over time rather than improving on its own. The brain and body become increasingly dependent on the substance, creating a cycle that becomes harder and harder to break without professional help.

In the beginning, someone might use drugs occasionally in social settings or to experiment. For some people, this use remains controlled and they never develop a disorder. But for others, the pattern changes. What started as occasional use becomes more frequent. The person begins to need the drug regularly, not just to feel good, but to feel normal. This happens because drugs release dopamine, a chemical in the brain that creates feelings of pleasure and reward. Over time, the brain starts to rely on the drug to produce these feelings, and natural sources of pleasure become less satisfying.^[2]

As the disorder progresses without treatment, people often develop tolerance. This means they need to take larger amounts of the drug to achieve the same effect they once got from smaller doses. This escalation increases the risk of serious health problems and makes the financial burden of maintaining drug use even heavier.^[2]

The untreated disorder also expands to affect more areas of life. Someone might start missing work or school because of drug use or recovery from its effects. Relationships with family and friends become strained as the person continues using despite conflicts and concerns from loved ones. Hobbies and activities that once brought joy lose their appeal, and the person’s life begins to revolve more and more around obtaining and using drugs.^[2]

Physical health often deteriorates without treatment. Different drugs cause different health problems, but many increase the risk of heart disease, liver damage, and infections. Mental health also suffers, with untreated drug use disorder commonly leading to or worsening depression, anxiety, and other mental health conditions.^[1]

Perhaps most seriously, untreated drug use disorder carries a significant risk of overdose, which can be fatal. Some drugs, particularly opioids like heroin and fentanyl, are especially dangerous. An overdose can happen even to someone who has used drugs many times before, because the strength of illegal drugs varies, or because mixing substances creates unpredictable effects. Tens of thousands of people die from drug overdoses in the United States each year, many of them from opioids.^[16]

Possible Complications

Drug use disorder can lead to numerous unexpected and serious complications that extend far beyond the immediate effects of drug use. These complications can affect nearly every organ system in the body and create additional health challenges that compound the original problem.

One of the most dangerous complications is the development of infectious diseases. People who inject drugs are at high risk for contracting HIV (the virus that causes AIDS) and hepatitis through shared needles. These are serious, lifelong infections that require their own complex treatments. Even people who don’t inject drugs face increased risk of sexually transmitted infections because drug use can impair judgment and lead to risky behaviors.^[16]

Cardiovascular problems represent another major category of complications. Many drugs, including cocaine and methamphetamine, put severe stress on the heart and blood vessels. This can lead to heart attacks, irregular heartbeats, and damage to the heart muscle, even in young people who would not normally be at risk for heart disease. These heart problems can develop suddenly and may be irreversible.^[16]

Mental health complications often develop alongside or worsen because of drug use disorder. People with untreated mental health problems like depression, anxiety, or attention deficit hyperactivity disorder are more likely to develop drug use disorder, and the drug use then makes these mental health conditions worse. This creates a vicious cycle where each condition fuels the other, making both harder to treat.^[1]

Lung damage is common among people who smoke drugs or use inhalants. This can lead to chronic breathing problems, increased susceptibility to respiratory infections, and in severe cases, permanent lung disease that affects quality of life for years to come.

Liver damage is particularly common with alcohol use disorder but can also occur with other substances. The liver is responsible for filtering toxins from the body, and repeated exposure to drugs overwhelms this system, potentially leading to liver disease or failure.

Unexpected injuries and accidents become more likely with drug use disorder. Drugs impair coordination, judgment, and reaction time, increasing the risk of falls, car accidents, and other trauma. Some people also experience injuries from violence, as drug use can occur in unsafe environments or lead to conflicts.^[16]

For pregnant women, drug use disorder creates serious complications for the developing baby. Drug use during pregnancy can cause birth defects, premature birth, low birth weight, and developmental problems that affect the child throughout life. Some babies are born dependent on drugs and experience painful withdrawal symptoms after birth.^[1]

Financial and legal complications often snowball as the disorder progresses. The cost of maintaining drug use can lead to debt, job loss, and poverty. Illegal drug use carries the risk of arrest and incarceration, which can have lasting effects on a person’s ability to find employment and housing even after recovery.

Impact on Daily Life

Drug use disorder doesn’t just affect health—it seeps into every corner of daily life, changing how a person functions, relates to others, and moves through the world. The impact is profound and touches physical abilities, emotional wellbeing, relationships, work, and personal interests.

Physically, people with drug use disorder often experience a decline in their ability to carry out basic daily tasks. Taking care of personal hygiene may fall by the wayside. Simple things like showering regularly, changing clothes, or brushing teeth become neglected. Energy levels fluctuate dramatically depending on whether the person is under the influence of drugs, experiencing withdrawal, or recovering from use. This unpredictability makes it hard to maintain any kind of routine.^[1]

Sleep patterns typically become disrupted. Some drugs keep people awake for days at a time, while others cause excessive drowsiness. Either way, the body never gets the consistent, quality rest it needs, leading to exhaustion, difficulty concentrating, and increased irritability. Appetite often changes too, with some drugs suppressing hunger and others increasing cravings, leading to weight loss or gain and nutritional deficiencies.

Emotionally, the disorder creates intense ups and downs. When using drugs, a person might feel euphoric, calm, or energized. But when the drug wears off, they often crash into anxiety, depression, or anger. These mood swings make it difficult to regulate emotions in healthy ways. Over time, the brain becomes less able to produce good feelings naturally, making everything seem gray and joyless without the drug.^[2]

Relationships suffer tremendously under the weight of drug use disorder. Family members and friends watch someone they love change before their eyes and often don’t know how to help. The person with the disorder might lie about their drug use, steal money to buy drugs, or miss important family events. Trust erodes, and conflicts become more frequent. Some people with drug use disorder isolate themselves, spending more time alone or only with others who use drugs. This isolation cuts them off from the support systems they most need.^[2]

At work or school, performance typically declines. Missing days becomes common, either because of drug use, recovery from drug effects, or the time spent obtaining drugs. When the person does show up, they may have trouble concentrating, remembering information, or completing tasks. Grades drop, work quality suffers, and eventually, job loss or academic failure may occur. This creates additional stress and shame, which can drive further drug use.^[2]

Hobbies and interests that once brought joy often get abandoned. The drug becomes the primary source of pleasure, and other activities seem boring or pointless in comparison. Someone who loved playing sports, creating art, or spending time outdoors might give up these activities entirely, narrowing their world to revolve around drug use.

Financial strain becomes a daily reality. Drugs cost money, sometimes a lot of it, and as tolerance builds and use increases, the costs rise. Bills go unpaid, savings disappear, and people may resort to selling possessions or borrowing money they can’t repay. This financial stress adds another layer of worry and shame to an already difficult situation.

Social activities change or disappear. The person might choose new friends based on shared drug use rather than genuine connection. Social invitations to events where drugs won’t be available get declined. Over time, the person’s social circle shrinks, and they become more disconnected from mainstream life.

Support for Family and Clinical Trials

When someone you love has drug use disorder and is considering participating in clinical trials, family members play a crucial role in supporting that decision and helping throughout the process. Understanding how clinical trials work and what kind of support to offer can make a real difference in the person’s ability to participate successfully.

Clinical trials are research studies that test new treatments or approaches to treating drug use disorder. These trials are essential for developing better treatments that can help more people achieve recovery. For someone with drug use disorder, participating in a clinical trial might offer access to new therapies that aren’t yet available to the general public, along with close medical monitoring and support.^[3]

Family members can help by first learning about what clinical trials are and how they work. This knowledge allows you to have informed conversations with your loved one about whether participation might be right for them. Clinical trials have specific requirements about who can join, and understanding these criteria helps set realistic expectations. Some trials look for people who have tried other treatments without success, while others might seek people who are just beginning treatment.^[3]

One of the most valuable ways families can help is by assisting in finding appropriate clinical trials. This can involve searching online databases that list current trials for substance use disorder, contacting local hospitals or research institutions, or asking healthcare providers about trials they might recommend. The National Institute of Mental Health and other organizations maintain registries of clinical trials that families can search by location and condition.^[3]

Preparing for trial participation often requires organization and follow-through, which can be challenging for someone struggling with drug use disorder. Family members can help by keeping track of appointment dates, organizing paperwork, and providing transportation to and from trial visits. Many trials require frequent visits, especially in the beginning, and having reliable transportation removes a significant barrier to participation.

Understanding that drug use disorder is a mental health condition, not a moral failing or lack of willpower, is essential for families. When family members grasp that this is a chronic disease affecting the brain, they can offer support without judgment. This understanding helps create an environment where the person feels safe discussing their struggles and successes honestly.^[2]

Families should also be prepared for the reality that recovery is rarely a straight line. Clinical trials, like other forms of treatment, may involve setbacks. If your loved one experiences a relapse during the trial, responding with compassion rather than anger or disappointment helps them stay engaged in treatment. Remember that relapse is a common part of chronic disease management, not a sign that the person or the treatment has failed.

It’s important for families to take care of themselves too. Living with someone who has drug use disorder is stressful and emotionally draining. Seeking support through family counseling, support groups for families of people with substance use disorders, or individual therapy can help family members maintain their own wellbeing while supporting their loved one.

Family members can also help by creating a stable, supportive home environment. This might mean removing triggers like alcohol or drugs from the home, establishing clear boundaries about acceptable behavior, and being consistent in following through with those boundaries. At the same time, showing unconditional love and belief in the person’s ability to recover provides crucial emotional support.

Communication is key throughout the clinical trial process. Ask your loved one how they want to be supported and what kind of help feels most useful. Some people want someone to attend appointments with them, while others prefer to go alone but appreciate check-ins afterward. Respecting these preferences while staying engaged shows that you care about their autonomy and their recovery.

Finally, families should understand that participating in a clinical trial is a generous act that helps not only the individual but also advances scientific knowledge that could help countless others. Acknowledging this contribution and expressing appreciation for their participation can reinforce the person’s sense of purpose and commitment to recovery.