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David C Barbosa

3 papers in the library · 58 citations · publishing 2025

Papers

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Rapid and sustained antidepressant effects of vaporized N,N-dimethyltryptamine: a phase 2a clinical trial in treatment-resistant depression.

Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology May 1, 2025 Marcelo Falchi-Carvalho, Fernanda Palhano-Fontes, Isabel Wießner et al. 35 citations

Depression affects over 185 million people worldwide, with approximately one-third classified as treatment-resistant depression (TRD). Current treatments, such as oral antidepressants, often take around 3 weeks to become effective, with no immediate anti-suicidal benefits. The field urgently needs innovative therapies that provide rapid relief. Psychedelics like psilocybin and ayahuasca have...

The Antidepressant Effects of Vaporized N,N-Dimethyltryptamine: An Open-Label Pilot Trial in Treatment-Resistant Depression.

Psychedelic medicine (New Rochelle, N.Y.) March 1, 2025 Marcelo Falchi-Carvalho, Handersson Barros, Raynara Bolcont et al. 16 citations

N,N-Dimethyltryptamine (DMT), a naturally occurring psychedelic tryptamine contained in the indigenous ayahuasca brew, has shown antidepressant effects. This open-label clinical trial investigates for the first time the efficacy of vaporized DMT in treatment-resistant depression (TRD). Six TRD patients participated in an open-label, fixed-order, dose-escalation study, receiving a lower (15 mg)...

Repeated subcutaneous esketamine on treatment-resistant depression: An open-label dose titration study.

Journal of Affective Disorders January 15, 2025 Fernanda Palhano-Fontes, Patrícia Cavalcanti-Ribeiro, Kaike Thiê da Costa Gonçalves et al. 7 citations

Ketamine has gained prominence as one of the most effective therapeutic options in unipolar treatment-resistant depression (TRD). However, most studies related to the antidepressant action of ketamine used intravenous (IV) or intranasal (IN) administration. The subcutaneous (SC) route of administration is a promising alternative, as it results in plasma levels comparable to IV, causes fewer...