MDMA as well as amphetamine and alcohol increase feelings of social closeness in healthy adults.

Abstract

Psychoactive drugs such as alcohol and stimulants are typically used in social settings such as bars, parties or small groups. Yet, relatively little is known about how social contexts affect responses to drugs, or how the drugs alter social interactions. It is possible that positive social contexts enhance the rewarding properties of drugs, perhaps increasing their potential for repeated use and abuse. In addition, drugs may enhance the rewarding effects of social interactions by increasing feelings of social closeness and connectedness. To examine these relations, we investigated the effects of several drugs (MDMA, methamphetamine, alcohol) on feelings of connection between two strangers engaged in a conversation. We also investigated feelings of connection between two participants who discussed either 'shallow' or deeper topics in two conversations, without any drugs. All four conditions: deeper conversations, MDMA, methamphetamine and alcohol significantly increased feelings of connection and closeness compared with control conditions (small talk or placebo). We postulate that these feelings of connection could contribute to the drugs' rewarding effects when the drugs are used in social contexts.

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