A Randomized Multi-centre Double-blind Placebo Controlled Trial to Demonstrate the Efficacy and Safety of Nabiximols in the Treatment of Adults With Chronic Tic Disorders

Inclusion criteria

• 1. Chronic tic disorder or Tourette syndrome according to DSM-5 2. Age ≥18 years 3. Total tic score of the Yale Global Tic Severity Scale (YGTSS-TTS) \> 14 for patients with Tourette syndrome or YGTSS-TTS \> 10 for patients with chronic motor or vocal tics only (= CTD) 4. Clinical Global Impression-Severity Score (CGI-S) ≥ 4 5. Medication (and stimulation parameters for deep brain stimulation) for tics and comorbidities must be on a stable dose for at least 30 days before entering the study and patient must consent to maintain the stable dose during the study 6. Signed written informed consent and willingness to comply with treatment and follow-up procedures 7. Patients capable of understanding the investigational nature, potential risks and benefits of the clinical trial 8. Prevention of pregnancy: Women without childbearing potential defined as follows:
• at least 6 weeks after surgical sterilization by bilateral tubal ligation or bilateral oophorectomy or
• hysterectomy or uterine agenesis or
• ≥ 50 years and in postmenopausal state ≥ 1 year or
• \< 50 years and in postmenopausal state ≥ 1 year with urine FSH \> 40 IU/l and urine oestrogen \< 30 ng/l or a negative oestrogen test or Women of childbearing potential with a negative urine ß-HCG pregnancy test at screening who agree to meet one of the following criteria from the time of screening, during the study and for a period of three months following the last administration of study medication:
• correct use of contraception methods. The following are acceptable: hormonal contraceptives (combined oral contraceptives, oestrogen-free pills with desogestrel, implants, transdermal patches, hormonal vaginal devices or injections with prolonged release), intrauterine device (IUS)
• true abstinence (periodic abstinence and withdrawal are not acceptable methods of contraception)
• sexual relationship only with female partners and/or sterile male partners or Males who are not surgically sterile and who are sexually active with female partner(s) of childbearing potential must agree to correct use of one of the following contraception methods from the time of screening, during the study and for a period of three months following the last administration of study medication: hormonal contraceptives (combined oral contraceptives, oestrogen-free pills with desogestrel, implants, transdermal patches, hormonal vaginal devices or injections with prolonged release), intrauterine device (IUS)