Buprenorphine Oral Lyophilisate for Treatment of Opioid Use Disorder: Pharmacology and Clinical Efficacy

<b>Background/Objectives</b>: Opioid use disorder (OUD) is a chronic relapsing condition associated with elevated mortality and substantial psychiatric and somatic comorbidity. Oral methadone and sublingual and depot buprenorphine are the undisputed gold standard in opioid agonist treatment (OAT). More recently, another oral buprenorphine formulation, buprenorphine lyophilisate (BUP-Lyo), has been introduced into clinical practice, offering potentially faster bioavailability and simplified administration. This review aims to summarize the available clinical and pharmacological data on BUP-Lyo and assess its potential role within current OAT strategies. <b>Methods</b>: A targeted Medline search was performed to identify publications reporting pharmacological characteristics, safety, efficacy, and clinical use of BUP-Lyo. Additional information was requested from the manufacturer. Relevant sources were reviewed narratively with a focus on OUD treatment, with particular attention to the pharmacological and clinical profile of the compound. <b>Results</b>: Few studies on BUP-Lyo have been published to date. As a rapid-dispersion formulation placed on the tongue, BUP-Lyo provides faster bioavailability and a quicker route of administration compared with conventional sublingual buprenorphine. These properties may reduce the need for post-administration supervision and could lessen risks of misuse or diversion. Available evidence supports its safety, efficacy, and feasibility within routine OAT, and the clinical implications of these characteristics are discussed. <b>Conclusions</b>: BUP-Lyo expands the range of available buprenorphine formulations and offers practical advantages through accelerated absorption and simplified administration. While initial data are encouraging, the limited evidence base underscores the need for further longitudinal and post-marketing studies to define its clinical position in the management of OUD.