The aim of the trial is to prove the efficacy and safety of VER-01 compared to placebo in patients with chronic painful lumbosacral radiculopathy (PLSR) for whom drug treatment is indicated and previous optimized treatments with non-opioid analgesics have not led to sufficient pain relief or were unsuitable due to contraindications or intolerance.

Inclusion Criteria:

• Participants ≥ 18 years of age, all sexes
• Participant voluntarily provided written informed consent
• Participant is willing and able to comply with scheduled visits, treatment plan, eDiary, and other trial-related procedures throughout trial participation

Exclusion Criteria:

• Pregnant or breastfeeding female patients
• Known history of previous or current severe psychiatric disorder as per DSM-5 (e.g., schizophrenia, bipolar disorder, severe anxiety disorder, psychotic disorder, post-traumatic stress disorder), or currently taking antipsychotic medication
• Cardiovascular event or clinically significant cardiac dysfunction (e.g., congestive heart failure, myocardial ischemia, arrhythmias, poorly controlled high blood pressure, congenital long QT syndrome) within 12 months or a cardiac disorder that, in the opinion of the investigator, would put the patient at risk of a clinically significant arrhythmia or myocardial infarction