Evidence-based. Free. Not a treatment provider.

Understand substance abuse treatment before you commit to it.

Clear, sourced explanations of how treatment actually works — levels of care, what happens in each, and how to choose — without the industry noise or sales pressure.

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Three things worth knowing first

Most people researching treatment are doing it for the first time, usually in a hurry, sometimes at 2 a.m. Start with these three facts.

Treatment is a continuum, not a single place

Medical detox, residential programs, partial hospitalization (PHP), intensive outpatient (IOP), standard outpatient therapy: it is a ladder, and the right rung depends on medical risk, the substance involved, and what home looks like. Not on which facility advertises hardest.

Some withdrawals are medical emergencies

Stopping alcohol or benzodiazepines abruptly after heavy use can cause seizures. People die from it. Opioid withdrawal rarely kills directly, but it drives relapse — and relapse after lowered tolerance drives overdose. Medical supervision exists for a reason.

Check what your plan actually covers

Most individual and small-group health plans must include substance use disorder services, and federal parity law generally requires plans that cover them to do so on terms no more restrictive than comparable medical care. Your coverage still depends on your plan, network, prior authorization, and medical necessity, so call the number on your insurance card and ask about the specific level of care.

Interactive tool

Not sure where to start? Answer six questions.

Our treatment options guide asks some of the questions a clinical intake would ask: the substance, the pattern of use, withdrawal risk, prior treatment, living situation. Then it explains which levels of care are often considered for situations like that, and why. It is not an assessment.

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Private. Nothing is stored or transmitted. Educational only — not a diagnosis.

What it covers

Alcohol, opioids, benzodiazepines, stimulants, cannabis. It flags the withdrawal situations that are medically risky, translates the common level-of-care distinctions into plain language, and arms you with the questions to ask when you call a program.

44.6M
People aged 12 or older in the U.S. had a past-year substance use disorder in 2025 (15.3%), per SAMHSA's National Survey on Drug Use and Health.
About 1 in 6
People aged 12 or older who needed substance use treatment in 2025 received it (16.0%), per the same survey.
24/7
SAMHSA's free, confidential National Helpline operates around the clock: 1-800-662-4357.
Start here

Choosing a level of care

Detox. Residential. Partial hospitalization, intensive outpatient, outpatient. The names get used loosely, and the differences matter more than the industry lets on. These guides explain how placement is decided and what to verify before admission.

Treatment decisions

Levels of Care for Substance Use Treatment, Explained

Detox, inpatient, residential, PHP, IOP, outpatient — substance use treatment is a ladder, and clinicians follow criteria for when care steps up or down. Here is how the rungs differ.

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Treatment decisions

Detox vs. Residential Treatment: What Changes After Stabilization?

Detox manages withdrawal. Residential treatment takes on what comes next. Two different jobs, different staffing — and a handoff between them that deserves far more scrutiny than it usually gets.

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Treatment decisions

PHP vs. IOP: Hours, Structure, and Who Each May Fit

PHP or IOP? Both treat substance use without an overnight bed, but the hours, medical support, and housing questions differ — and the right answer usually comes down to how much structure will hold.

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How to choose a treatment program →
From the resource center

Cannabis reactions, explained clearly

Cannabis products keep getting stronger, and the acute reactions are keeping pace: “greening out,” edible overconsumption, cannabinoid hyperemesis. This cluster covers what's actually happening and what to do about it.

Pillar guide

Greening Out: Symptoms, Causes, and What to Do

Pale, sweaty, dizzy, heart pounding after too much THC — that is greening out. What is actually happening in the body, how long it lasts, and the point where home care stops being enough.

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Edibles

Why Edibles Hit Harder — and Later

Edibles cause a share of cannabis ER visits far out of proportion to how much is sold. Why they take effect later, last longer, and why a second dose is often the mistake.

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Overdose

Can You Overdose on Weed? What the Evidence Says

Can you overdose on weed? Deaths from cannabis alone appear to be very rare, but cannabis poisoning is real, rising, and sometimes an emergency. Here is what the risks are and who faces them.

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CHS

Cannabinoid Hyperemesis Syndrome: When Cannabis Turns on Its Heaviest Users

Cannabinoid hyperemesis syndrome puts some frequent, long-term cannabis users through cycles of severe vomiting and abdominal pain. The warning signs, what treatment involves, and why abstinence is the fix.

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Anxiety

Cannabis-Induced Anxiety and Panic: Why the "Relaxing" Drug Isn't Always

Why does weed cause anxiety and panic attacks in some people? The THC dose-response curve, who's most at risk, how to get through a cannabis panic episode, and when anxiety after weed signals something more.

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Withdrawal

Cannabis Withdrawal: Symptoms, Timeline, and What Helps

Cannabis withdrawal is real for many frequent, long-term users: irritability, poor sleep, cravings. What the first two weeks tend to look like, what helps at home, and when professional treatment makes sense.

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See all articles →

If this is urgent, don't research — call.

Call 911 if someone is unresponsive, having a seizure, struggling to breathe, confused or hallucinating during withdrawal, has chest pain, or is in danger of hurting themselves or someone else. For a suicidal or mental health crisis, call or text 988. For a possible poisoning or overdose in someone who is awake and breathing, call Poison Control. To find treatment, call SAMHSA's National Helpline. All three are free, confidential, and open 24/7.

988 Suicide & Crisis Lifeline (call or text)
SAMHSA National Helpline
Poison Control