%0 Journal Article %T Pure delta %A Erich Seifritz %A Eva-Maria Pichler %A Patrik Roser %A Wolfram Kawohl %J The International Journal of Psychiatry in Medicine %@ 1541-3527 %D 2019 %R 10.1177/0091217418791455 %X Anecdotal reports and preliminary studies suggest a therapeutic potential of cannabis in Tourette syndrome. We report the case of a female patient suffering from treatment-resistant Tourette syndrome. Guideline-directed antipsychotic treatment with risperidone and aripiprazole as well as pure delta-9-tetrahydrocannabinol had no significant effect on Tourette syndrome symptomatology. Following administration of a daily dosage of 10 mg delta-9-tetrahydrocannabinol combined with 20 mg cannabidiol (CBD), the patient showed a rapid and highly significant improvement in the Yale Global Tic Severity Scale. It can be speculated whether the beneficial effects may rely on the pharmacological properties of cannabidiol %K Tourette syndrome %K tic disorders %K cannabis %K delta-9-tetrahydrocannabinol %K cannabidiol %U https://journals.sagepub.com/doi/full/10.1177/0091217418791455