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Clear, sourced overviews of common substances - effects, risks, overdose signs, and treatment options.
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Guides & Articles
View all →fundamentals
Understanding Addiction: How Substance Use Disorder Develops
A plain-language guide to how addiction develops in the brain, the signs of substance use disorder, and the evidence-based paths to recovery.
June 8, 2026
access
Does Medicaid Cover Rehab? What the Program Pays For
What federal law requires Medicaid to cover for addiction treatment in every state, what each state decides for itself, and how to check your own benefits.
August 30, 2026
treatment
How to Choose a Rehab: A Practical, Evidence-Based Guide
How to judge an addiction treatment program - the practices that signal quality, the questions to ask, the red flags, and what the evidence actually supports.
August 30, 2026
Substance Information
View all →Stimulant
Adderall (Amphetamine)
Adderall is a prescription amphetamine stimulant used for ADHD. Learn its effects, the risks of misuse and counterfeit pills, warning signs, and treatment.
Depressant
Alcohol
Alcohol is the most widely used drug in the US. Learn its effects, health risks, dangerous withdrawal, and treatment options.
Stimulant
Cocaine
Cocaine is a powerful stimulant that can trigger heart attack or stroke, even in young users. Learn its effects, risks, overdose signs, and treatment.
Synthetic opioid
Fentanyl
Fentanyl is a potent synthetic opioid driving the overdose crisis. Learn its effects, risks, overdose signs, and treatment options.
Opioid
Heroin
Heroin is an illegal opioid with a high overdose risk, increasingly contaminated with fentanyl. Learn its effects, risks, overdose signs, and treatment.
Stimulant
Methamphetamine
Methamphetamine (meth) is a powerful, highly addictive stimulant that can cause heart attack, stroke, and psychosis. Effects, risks, and treatment.