If you love someone whose drinking or drug use has taken over, you’ve probably caught them in lies you never thought they were capable of. Small ones, then larger ones. Lies about where the money went, about how much they drank, about whether they used at all. After a while it can feel like the person you knew has been replaced by someone who deceives you as easily as breathing. That experience is real, and it’s one of the most painful parts of watching addiction take hold.
It helps to be precise about what’s happening, because the word people reach for, “pathological lying,” means something specific. Pathological lying, also called pseudologia fantastica, describes compulsive, far-reaching fabrication that often isn’t tied to any obvious gain. According to StatPearls (NIH), it isn’t a standalone diagnosis in the DSM-5, and it’s a distinct clinical phenomenon from the goal-driven deception that shows up in substance use. The lying that surrounds addiction is usually purposeful. It protects the using. Understanding that difference changes how you respond.
Why Someone With an Addiction Lies About It
The reasons vary from person to person, but a few patterns show up again and again.
- To protect the addiction. This is the most common driver. When using a substance has become the organizing priority of someone’s day, anything that threatens access to it gets defended, including with lies. The deception isn’t aimed at hurting you. It’s aimed at keeping the using going.
- To avoid confrontation. People in active addiction often come across as combative, when what they’re actually doing is dodging a conversation they don’t have the tools to handle. Substances may have become the main way they cope with stress, so a hard talk about their use can feel unbearable, and a quick lie ends it.
- Out of shame. On some level, most people struggling with a substance know the behavior is hurting them. Having that named out loud, especially by someone whose opinion they care about, can trigger deep shame, and lying becomes a way to keep the shame at a distance.
- Because the lies keep working. When family members go along with a story to keep the peace, the lie gets reinforced. Smoothing things over feels like protection in the moment, but it quietly teaches the person that deception is an effective tool, which makes it harder to break later.
Is It Lying, or Is It Something the Brain Is Doing?
Some of what looks like lying isn’t a choice in the way we normally mean the word. Addiction changes the brain, and one of the systems it affects is the one responsible for self-awareness and honest insight. In a review published in Trends in Cognitive Sciences, researchers studying the neurocircuitry of impaired insight in drug addiction found that what families and clinicians often call “denial” can reflect genuine dysfunction in brain regions tied to interoception and self-monitoring, including the insula and parts of the prefrontal cortex. They point out that the term denial wrongly assumes the person fully knows the truth and is choosing to negate it.
The same dynamic shows up in treatment-seeking. The National Institute on Drug Abuse explains that addiction shifts the balance of power between the prefrontal cortex, which handles judgment and impulse control, and deeper brain circuits that drive compulsive seeking. When that balance tips, the capacity to assess one’s own situation clearly can erode. This doesn’t excuse the harm the lying causes, and it doesn’t mean every untruth is involuntary. It does mean the person in front of you may not be the cold manipulator they appear to be.
When Deception Points to More Than Addiction
Persistent deception, withdrawal, and erratic behavior aren’t always about the substance alone. They can also signal an underlying mental health condition that the substance use is masking or feeding. Depression, anxiety, trauma, and mood or thought disorders frequently travel alongside addiction, and someone may use substances to quiet symptoms they’ve never had diagnosed or treated. When that’s the case, addressing the drinking or drug use without addressing the mental illness underneath tends to fail.
This is the work Destination Hope is built for. We’re a psychiatrist-led residential program in Florida that treats mental health as the primary condition and addresses co-occurring substance use at the same time, through integrated dual diagnosis treatment rather than a habit-only model. A thorough psychiatric evaluation can surface what’s actually driving the behavior, so the lying that’s been tearing at your family becomes a symptom you can finally treat instead of a character flaw you keep colliding with.
How to Respond Without Losing Yourself
Supporting someone who lies to you is exhausting, and it’s normal for it to wound you. Try to remember that the deception is about the addiction, not about you. Staying calm and refusing to take the bait of every untruth protects your own footing. At the same time, going along with the lies to avoid a fight only deepens the pattern. The steadier path is honesty paired with support: be clear about what you see, and just as clear that you want them well.
For families who want a framework, our family program helps loved ones set boundaries, stop enabling, and understand what genuine recovery requires. You don’t have to keep guessing what’s true on your own.
Get Help Before the Next Lie
If someone you love is disappearing into addiction and the mental health struggles behind it, you don’t have to wait for them to admit everything first. Our admissions team can talk through what’s happening and help you figure out the right next step. Learn more about starting treatment at Destination Hope, or call us anytime at (954) 302-4269. We can pick up where you’ve been holding the line alone.
Crisis and Emergency Resources
If you or someone you know is in a substance use or mental health crisis, help is available now. Contact the SAMHSA National Helpline at 1-800-662-HELP (4357) for free, confidential treatment referrals 24/7. Reach the 988 Suicide and Crisis Lifeline by calling or texting 988. The Crisis Text Line is available by texting HOME to 741741. For emergencies, call 911.
