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Exploring the Utility and Appropriateness of Dose Thresholds for Issuing of Public Drug Alerts on High-Dose MDMA: A Qualitative Study.

Jack Freestone, Harriet MacDonald, Stassi Kypri, Brendan Clifford, Krista J. Siefried, Nadine Ezard

Drug and Alcohol Review March 1, 2026 DOI: 10.1111/dar.70140 (opens in new tab)

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Study at a glance

AI-extracted from the abstract
Characteristics Qualitative study Peer reviewed
Sample size 15
Population Experts responsible for design and dissemination of drug alerts in Australia
Topics MDMA
Keywords Drug toxicity Harm reduction Public health alerts
Key findings Most experts agreed that a 150 mg free-base MDMA threshold is reasonable for issuing high-dose alerts, though thresholds are binary and cannot account for evolving trends, and limited community monitoring provides little evidence to change the threshold.

Abstract

Drug alerts are sometimes issued when samples are found to exceed a pre-determined dose threshold. In Australia, it is common for alerts to be issued when MDMA pills contain ≥ 150 mg of MDMA free-base or 179 mg hydrochloride. Nineteen such alerts were issued in Australia in 2024, raising concerns that repeat alerts may lose impact over time. This study examined experts' viewpoints on the appropriateness and utility of using a 150 mg threshold to trigger high-dose MDMA alerts. Fifteen participants responsible for the design and dissemination of drug-alerts in Australia completed an online survey and seven participated in a focus group. The survey and focus group elicited reflections on the use of thresholds when issuing alerts about high-dose MDMA. Data were thematically analysed using a qualitative description methodology. Although thresholds are binary and cannot account for evolving trends in MDMA manufacture or consumption, most agreed that 150 mg free-base is a reasonable threshold for issuing alerts. It was noted that 150 mg of MDMA may cause harm, that high-dose alerts are contingent on a threshold, and that thresholds enable rapid communications. Due to Australia's limited capacity to monitor community perceptions of alerts, there was little evidence to justify a change in the threshold. Notifying communities about products containing ≥ 150 mg MDMA remains a harm-reduction priority. Establishing a database containing dosage and purity results for all analytically tested samples and increasing efforts to monitor community responses to and perceptions of drug alerts may improve future risk communication.

Comparable studies

Other qualitative studies on MDMA, most cited first.

Study Year Design Participants
Phenomenology and Sequelae of 3,4-Methylenedioxymethamphetamine Use Psychiatrists who had taken MDMA 1992 Qualitative study n = 20
MDMA and Sexual Behavior: Ecstasy Users' Perceptions About Sexuality and Sexual Risk Current and former users of MDMA 2005 Qualitative study n = 98
Perceived Benefits of MDMA-Assisted Psychotherapy beyond Symptom Reduction: Qualitative Follow-Up Study of a Clinical Trial for Individuals with Treatment-Resistant PTSD Veterans, firefighters, and police officers with chronic, treatment-resistant PTSD 2019 Qualitative study using interpretative phenomenological analysis n = 19
Negative Experiences on Ecstasy: The Role of Drug, Set, and Setting Current or former users of Ecstasy 2002 Qualitative study n = 98
A Qualitative Exploration of Relational Ethical Challenges and Practices in Psychedelic Healing Practitioners who have administered MDMA and psilocybin to clients in underground... 2021 Qualitative study n = 23

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