A Prospective Clinical Trial to Evaluate the Efficacy and Safety of Neurotropic B-Vitamins in Clinically Diagnosed Peripheral Sensory Polyneuropathy of Different Etiologies.

This prospective, multi-center, randomized, double-blind, placebo-controlled, parallel-group Phase III clinical study is designed to investigate the efficacy and safety of the Test product versus placebo in male and non-pregnant female subjects with clinically diagnosed peripheral sensory polyneuropathy of different etiologies aged 18 to 70 years.

The study will be conducted in 17 sites in Mexico. 318 patients with clinically diagnosed symptoms of peripheral sensory polyneuropathy of different etiologies who fulfill the inclusion and exclusion criteria will be enrolled and randomized in a 1:1 ratio to receive either oral vitamin B combination daily or matching placebo for 120 days.

The primary and secondary outcome measures will be evaluated at each post-Screening visit. Exploratory outcomes, and safety/tolerability/treatment satisfaction assessments will be evaluated as per schedule of activities.

Approvals were obtained from Local Ethics Committees and from Mexican Regulatory Authority (COFEPRIS).

Inclusion criteria

• Able to understand the purpose and risks of the study
• Considered reliable and capable of adhering to protocol, visit schedule, and medication administration instructions
• Demonstrates that participant can successfully complete the study eDiary using electronic device
• Male or female, 18 to 70 years of age (inclusive)
• Subjects with symptoms of peripheral sensory polyneuropathy (measured with MNSI scale)
• NTSS-6 total score at Screening and Baseline: no severe symptoms
• Duration of peripheral sensory polyneuropathy symptoms ≥6 months
• Blood pressure ≤140/90 mmHg at Screening or taking a stable dose of antihypertensive medication
• Diabetes: diagnosed T1DM or T2DM ≥ 1 year prior Screening, HbA1c <9% at Screening, no severe hyper-/hypoglycemia/ketoacidosis
• Stable on allowed concomitant medication
• Contraception for women of childbearing potential and men with potentially fertile female partner

Exclusion criteria

• Subjects with genetic, autoimmune, inflammatory and chemotherapy-induced peripheral neuropathy (PN), compressive mononeuropathy of lower extremity
• Subacute onset of peripheral sensory polyneuropathy
• No increase in PN symptoms for 1 y or longer
• Pain in the rest of the body higher than pain in the lower limbs from peripheral sensory polyneuropathy
• Fails to successfully submit eDiary data
• Known hypersensitivity to vitamins B1, B6, or B12
• Taken vitamin supplement containing vitamins B1, B6, B12, E, D higher than RDA
• Taken alpha lipoic acid
• Taken any cytostatic drug
• Taken anti-epileptics, opioids or other drugs for neuropathic pain management.
• Use of cannabis/cannabidiol
• Taken topical medication that alters sensation of assessment
• Subjects with any active systemic infection or disease that requires antibiotics, antifungals, antiviral agents
• BMI ≥35 kg/m2
• Pregnancy, subjects planning to become pregnant, or breastfeeding subjects