Drugs affect mental health in both directions: they can create anxiety, depression, and paranoia that were not there before, and they can mask conditions that were already present. That two-way street is why “is it the drugs or is it me?” is one of the hardest questions to answer from the inside, and one of the most important.

In this article, Michael Damioli, MSW, CSAT, Chief Clinical Officer at AspenRidge Recovery Centers, explains what substances actually do to mental health, which usually comes first, and what happens to the mind in the weeks and months after someone stops.

If you have been trying to work out whether your drug use is causing or covering how you feel, this is the clearest way we know to think about it.

The Two-Way Street Between Drugs and Mental Health

Drugs and mental health disorders feed each other. The National Institute on Drug Abuse reports that about half of people who experience a mental illness will also experience a substance use disorder at some point, and vice versa. That overlap is so common it has a name: co-occurring disorders.

Damioli frames it simply for patients: they are two sides of the same coin, and treating one at a time is how you lose to both. The relationship runs three ways at once:

The pathway	What it looks like
Substance-induced	The drug creates or amplifies the symptoms: stimulant paranoia, alcohol-driven depression, anxiety states that did not exist before use
Self-medication	An existing condition, often anxiety, depression, or trauma, drives the person toward substances that work as short-term relief
The lifestyle layer	The secrecy, broken sleep, and shrinking world around addiction generate their own anxiety and depression on top of everything else

Most people who reach us are living all three at once, which is exactly why untangling them takes clinical time, not a self-diagnosis at 2 a.m.

Can Drugs Cause Mental Illness That Was Not There Before?

Yes, and Damioli says we see it constantly. Substances do not only reveal existing conditions. They build new ones.

• Stimulants (meth, cocaine) can produce genuine paranoia and anxiety states in people who never had them, and heavy use can tip into psychosis.
• Heavy cannabis use in a vulnerable brain can trigger real psychiatric symptoms, and research links it to earlier onset of psychosis in people predisposed to it.
• Alcohol is a depressant. Use enough of it and you will be depressed at a biological level, regardless of your history.
• The addiction lifestyle itself, the broken sleep, the secrecy, the isolation, manufactures its own anxiety and depression independent of the chemistry.

The honest clinical answer, in Damioli’s words: until the substances are removed and the brain has time to settle, you often cannot tell what was already there and what the drugs built.

Which Comes First, the Drug Use or the Mental Health Problem?

It runs both directions, and by the time someone reaches treatment, they usually cannot tell you which came first in their own story. Damioli does not treat that as a problem to solve before starting.

Some people had anxiety, depression, or trauma first and found that substances worked, for a while, as medicine. A lot of trauma sits underneath what we treat: people who never felt safe, using substances to manufacture a feeling of safety or relief. Other people started using and watched the mental health symptoms grow out of the use.

The clinical point Damioli keeps returning to: the order matters less than people think, because the treatment answer is the same either way. Both get treated together. The NIDA data backs this: it notes that comorbidity does not mean one caused the other, and that a comprehensive approach addresses both disorders at the same time.

If you have been trying to figure out the “which came first” question on your own for months, that is precisely the question an assessment is built to answer. It is free and confidential: (719) 259-1107.

Why Do Some People Feel More Stable On Drugs Than Off?

Because for them, the drug is doing a job. If someone has untreated anxiety, unprocessed trauma, or depression they have never named, the substance is functioning as medication. It is just bad medication: it works for two hours and charges interest.

So when they stop, they do not feel healthy. They feel unmedicated: raw, anxious, emotionally flooded. Of course using feels more stable than that.

What Damioli tells people is that the stability is borrowed, not owned. You are renting calm from tomorrow, and the rent keeps rising. The work of treatment is replacing the bad medication with things that actually hold: real coping skills, real therapy for what is underneath, and actual medication from a provider when it is appropriate. Stability you own instead of stability you rent.

What Changes When You Stop

Three things shift reliably, and two of them catch people off guard.

Sleep comes back

People badly underestimate how much of their “mental illness” was just a sleep-deprived brain. When sleep normalizes, mood and anxiety often improve on their own.

Emotions come back

Substances flatten you at both ends. Early recovery is when people start feeling things again. Uncomfortable at first, and then it becomes the entire point.

The depression and anxiety often lift on their own

For a lot of people, the symptoms were being driven by the substances. Take the drugs out and those symptoms start resolving without any other intervention.

And when they do not lift, Damioli is clear that this is not a failure. It is information. It means there is an underlying condition that needs its own treatment, which is exactly what our therapists and medical provider are there for.

How Long Until You See Your Real Baseline?

Longer than people want to hear, and that patience is part of the treatment.

Stage	What it means
Days to weeks	Withdrawal and rebound. Nothing here is your real baseline
Early weeks	The brain recalibrating. Sleep normalizing, emotions coming online, mood swinging. Still not baseline
Around 90 days	The real picture emerges. Symptoms either lift, or the underlying condition shows itself clearly enough to treat

This is why Damioli asks clients to commit to at least 90 days. You cannot measure your brain’s actual baseline two weeks after your last use.

It is also the window where, as he puts it, the lights come on. Someone walks in one day and something has shifted in how they meet the world.

How AspenRidge Treats Drugs and Mental Health Together in Denver

Because substances and mental health are so tangled at intake, treating them separately does not work. AspenRidge is built to treat both at once.

• Integrated dual-diagnosis care: master’s-level therapists address what is underneath the use while the substance use is treated, in one plan rather than two providers who never talk
• Medical support: our provider evaluates for medication when an underlying condition is real, using non-addictive options
• Structure that fits your life: hybrid in-person and virtual outpatient groups (PHP and IOP) built around work and family
• Time to find baseline: a program designed around the reality that the true mental health picture takes weeks to months to emerge

We accept Colorado Medicaid and most major insurance, and as a provider of affordable drug rehab in Denver, we verify coverage on the first call.

And because the mental health signs and the addiction signs blur together, it helps to know what you are actually looking at, which we break down into signs of drug addiction.

Ask a Clinician: Michael Damioli on Drugs and Mental Health

Can drugs cause a mental illness that was not there before?

“Yes, constantly. A lot of the depression and anxiety that walks through our doors was created or amplified by the substances themselves. Stimulants can produce paranoia and anxiety in people who never had them. Heavy cannabis in the wrong brain can trigger real psychiatric symptoms. Alcohol’s a depressant; use enough, and you’ll be depressed biologically. And the lifestyle around addiction, the broken sleep, the secrecy, generates its own layer on top. Until you remove the substances and give the brain time, you often can’t tell what was already there and what the drugs built.”

What are the top mental health changes when someone stops using?

“Sleep comes back, and people underestimate how much of their ‘mental illness’ was a sleep-deprived brain. Emotional range returns, which is uncomfortable at first and then becomes the point. And for a lot of people, the depression and anxiety just start to lift, because the substances were causing them. When they don’t lift, that’s not a failure, that’s information. It tells us there’s something underneath that needs its own treatment.”

Why do some people feel more stable on drugs than off?

“Because the drug is doing a job for them. If someone has untreated anxiety or unprocessed trauma, the substance is medication, just bad medication. It works for two hours and charges interest. So when they stop, they don’t feel healthy; they feel unmedicated. The stability is borrowed, not owned. You’re renting calm from tomorrow. Treatment is about building stability you actually own.”

 

Frequently Asked Questions

Can drugs cause permanent mental health problems?

Some effects can be lasting, particularly stimulant-induced psychosis or cannabis-triggered psychosis in vulnerable people. But many drug-related mental health symptoms improve significantly once use stops and the brain recovers. The only way to know which you are dealing with is to remove the substance and give the brain months, not days, to stabilize.

What is a substance-induced mental disorder?

It is a mental health condition, such as depression, anxiety, or psychosis, caused directly by drug or alcohol use and that occurs during use or shortly after. It is distinguished from an independent disorder that exists on its own. The distinction guides treatment, but both are treated together when they co-occur.

Do mental health problems get worse before they get better in recovery?

Often, yes. The first days are withdrawal and rebound, and early weeks involve a recalibrating brain, so mood can swing, and anxiety can spike before improving. This is expected. Most people begin seeing their true baseline emerge around the 90-day mark, which is why longer treatment produces better outcomes.

Should mental health and addiction be treated at the same time?

Yes. NIDA is clear that co-occurring conditions should be treated together rather than one at a time. Treating only the addiction leaves the driver of relapse in place; treating only the mental illness leaves the substance undermining every gain. Integrated, or dual-diagnosis, care addresses both in a single coordinated plan.

How long after quitting drugs does mental health improve?

The first weeks are withdrawal and recalibration, not your real baseline. The true mental health picture usually emerges around 90 days, once sleep normalizes and the brain settles. At that point, symptoms either lift because the drugs were driving them, or reveal an underlying condition clear enough to treat properly.