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

Phase 3

Completed

• Conditions: Peripheral Sensory Neuropathy of Different Etiologies
• Interventions: Drug: Vitamin B combination tablet; Drug: Placebo Tablet

• Registration Number: NCT05619328
• Lead Sponsor: Procter and Gamble

Brief Summary

This study is designed to investigate the efficacy of the Test Product in subjects with clinically diagnosed peripheral sensory polyneuropathy of different etiologies compared to placebo.

Detailed Description

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).

Study Timeline

• Study Start: 2022-09-06
• Study First Submitted: 2022-11-07
• Study First Submitted QC: 2022-11-15
• Study First Posted: 2022-11-16
• Status Verified: 2023-11
• Primary Completion: 2023-11-02
• Study Completion: 2023-11-02
• Last Update Submitted: 2023-11-27
• Last Update Posted: 2023-11-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 323

Inclusion Criteria

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

Exclusion Criteria

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Vitamin B combination tablet (B1, B6, B12)	Vitamin B combination tablet	-
Placebo tablet	Placebo Tablet	-

Primary Outcome Measures

Name	Time	Method
Neuropathy Total Symptom Score-6 (NTSS-6)	120 days	The NTSS-6 scale is a validated neuropathy symptoms scale which evaluates the frequency and intensity of 6 neuropathy sensory symptoms in feet and legs such as numbness, prickling sensation, burning/aching/lancinating pain and allodynia.

Secondary Outcome Measures

Name	Time	Method
Quality of Life Questionnaire	120 days	The Quality of Life Questionnaire is a reliable, and valid measure of physical and mental health.
modified Toronto Clinical Neuropathy Score (mTCNS) sensory test subscores	120 days	The mTCNS is a reliable clinical score with high validity for tracking mild to moderate distal symmetric polyneuropathy (DSP) and is sensitive to early DSP changes.
B vitamins blood levels	120 days	Assess the effect of the Test Product on concentrations of vitamins B1, B6, and B12
Safety Data	120 days	Safety of Vitamin B combination tablet in patients with peripheral sensory polyneuropathy in the feet comparing the incidence of adverse and serious adverse events, and the incidence of clinically significant laboratory values to Placebo; * Incidence of adverse events (AEs) and serious adverse events (SAEs); * Incidence of clinically significant laboratory values

Trial Locations

Locations (1)

RM Pharma Specialists S.A. de C.V.; 🇲🇽 Mexico City, Mexico