RT Journal Article SR Electronic T1 Nabiximols discontinuation rate in a large population of patients with multiple sclerosis: a 18-month multicentre study JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 914 OP 920 DO 10.1136/jnnp-2019-322480 VO 91 IS 9 A1 Chisari, Clara Grazia A1 Solaro, Claudio A1 Annunziata, Pasquale A1 Bergamaschi, Roberto A1 Bianco, Assunta A1 Bonavita, Simona A1 Brescia Morra, Vincenzo A1 Bruno Bossio, Roberto A1 Capello, Elisabetta A1 Castelli, Letizia A1 Cavalla, Paola A1 Costantino, Gianfranco A1 Centonze, Diego A1 Cottone, Salvatore A1 Danni, Maura Chiara A1 Esposito, Federica A1 Gajofatto, Alberto A1 Gasperini, Claudio A1 Guareschi, Angelica A1 Lanzillo, Roberta A1 Lus, Giacomo A1 Maniscalco, Giorgia Teresa A1 Matta, Manuela A1 Paolicelli, Damiano A1 Petrucci, Loredana A1 Pontecorvo, Simona A1 Righini, Isabella A1 Rovaris, Marco A1 Sessa, Edoardo A1 Spinicci, Gabriella A1 Spitaleri, Daniele A1 Valentino, Paola A1 Zaffaroni, Mauro A1 Zappia, Mario A1 Patti, Francesco YR 2020 UL http://jnnp.bmj.com/content/91/9/914.abstract AB Introduction Delta-δ-tetrahydrocannabinol and cannabidiol (THC:CBD) oromucosal spray is used as an add-on therapy option for moderate to severe multiple sclerosis (MS) spasticity resistant to other medications. Aims of this study were to provide real-life data on long-term clinical outcomes in a large population of Italian patients treated with THC:CBD and to evaluate predictors of THC:CBD therapy continuation.Materials and methods This prospective observational multicentre Italian study screened all patients with MS consecutively included in the Agenzia Italiana del Farmaco e-registry at the start of THC:CBD treatment (baseline), after 4 weeks (T1), 12±3 weeks (T2), 24±3 weeks (T3), 48±3 weeks (T4) and 72±3 weeks (T5) from baseline.Results A total of 1845 patients were recruited from 32 MS Italian centres. At T1, 1502 (81.4%) of patients reached a Numerical Rating Scale (NRS) improvement of ≥20%, with an NRS reduction of 26.9% at T1 and of 34.4% at T5. At T5, 725 patients (48.3% of 1502) discontinued treatment with highest discontinuation rate at T2 and T3. Daily number of puffs was generally stable through the observation period. The multivariate analysis showed that higher NRS scores at baseline (OR 2.28, 95% CI 1.15 to 6.36, p<0.01) and higher differences of NRS between T0 and T1 (OR 2.11, 95% CI 1.08 to 8.26, p<0.05) were associated with an increased probability to continue therapy after 18 months.Discussion THC:CBD effects were sustained for 18 months with a relatively stable number of puffs per day. About 50% of patients abandoned THC:CBD therapy for loss of efficacy or adverse events.