Which agency provides extensive information on substance use disorders including treatment referrals?

The Substance Abuse and Mental Health Services Administration (SAMHSA) is the correct answer because it is specifically tasked with providing a wide range of information and resources related to substance use disorders, including prevention, treatment, and recovery support services. SAMHSA operates a national helpline that offers confidential referrals for individuals seeking treatment for substance use issues, making it a vital resource for families and individuals in need of assistance.

In contrast, while the National Institute on Drug Abuse (NIDA) conducts research and provides information primarily focused on the understanding of drug abuse and its effects, it does not primarily focus on treatment referrals and support services. The Food and Drug Administration (FDA) is primarily concerned with the safety and efficacy of drugs and medical devices rather than directly addressing substance use disorder treatment. The Centers for Disease Control and Prevention (CDC) focuses on public health issues including disease control and prevention, rather than specifically on substance use treatment resources.