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Thymoquinone as an add-on Therapy for the Management of Patients With Diabetic Peripheral Neuropathy

Efficacy of Thymoquinone as an Adjuvant Treatment With Pregabalin for the Treatment of Neuropathy in Diabetic Patients: A Randomized Clinical Trial of 65 mg of Thymoquinone and 75 mg Pregabalin Daily for Two Months

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07313111
Acronym
TQDPN
Enrollment
50
Registered
2025-12-31
Start date
2024-07-01
Completion date
2025-09-01
Last updated
2025-12-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diabetic Peripheral Neuropathy (DPN)

Keywords

diabetic neuropathy, thymoquinone, nerve conductive study, oxidative stress

Brief summary

The goal of this clinical trial is to evaluate the efficacy of thymoquinone as an adjuvant treatment with pregabalin in the management of diabetic peripheral neuropathy for both sexes older than 18 years. The main questions it aims to answer are: * Whether the use of thymoquinone could improve diabetic neuropathy and be confirmed by a nerve conduction study? * Could thymoquinone improve oxidative stress and inflammation by using these parameters (visfatin, calprotectin, malondialdehyde)? * Does thymoquinone improve neuropathic pain by using the VAS scale for pain?

Detailed description

Study Design and Methodology This is a randomized, clinical trial designed to evaluate the neuroprotective effects of thymoquinone in diabetic patients with neuropathy. Study Sites Primary Location: Galyawa diabetic center and Neurophysiology Department of Hawler Psychiatric Hospital, affiliated with Hawler Medical University. Multicenter expansion was considered, but all participants were recruited at the primary site. Study Population Enrollment (Actual): 50 participants with diabetic neuropathy Groups: Group 1 (n=25): DPN patients on Pregabalin 75 mg daily for 2 months. Group 2 (n=25): DPN patients on Pregabalin 75 mg + Thymoquinone 65 mg daily for 2 months. Follow-up Period Duration: 2 months from initiation of treatment. Assessment intervals: Baseline (pre-treatment) and 2 months (post-treatment). Primary outcome: A Nerve conductive study was done, and blood samples for (visfatin, calprotectin, malondialdehyde, and HbA1c) measurement were drawn before starting treatment. Secondary or Endpoints: the same investigations were done after two months of treatment Adverse Events: Monitored continuously throughout the 2-month treatment and follow-up, including risks of epigastric pain, dizziness, and headache. Statistical Analysis Plan Sample Size: Originally planned for 80 patients, but 50 were enrolled (25 per group). Comparative Analysis: Paired t-tests, Wilcoxon signed-rank tests (for non-parametric data), ANOVA for repeated measures where appropriate. Ethical Considerations Approved by the Hawler Medical University Ethics Committee. Written informed consent was obtained from all participants. Potential Impact: If thymoquinone proves effective, this study could support the use of thymoquinone as a neuroprotective strategy in diabetic neuropathic patients, improving NCS outcomes and quality of life.

Interventions

DIETARY_SUPPLEMENTthymoquinone

participants recieved 65 mg of thymoquinone capsule daily for two months

DRUGstander treatment pregabalin

Participants received 75 mg of a pregabalin capsule for two months

Sponsors

Hawler Medical University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Group one received standard treatment (pregabalin) and group two received standard treatment plus interventional treatment (pregabalin + thymoquinone)

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
Yes

Inclusion criteria

1. Both males or females of any race over 18 years of age. 2. Patients with either type1 or type2 diabetes, who have been on a stable anti-diabetic medication regimen for at least 30 days before randomization. 3. Duration of painful diabetic peripheral neuropathy was required to be more than 3 months.

Exclusion criteria

1. History of smoking, alcohol consumption, and thyroid gland disorder. 2. Patients with any kidney disorder or any conditions that could confound the assessment of pain due to diabetic peripheral neuropathy.

Design outcomes

Primary

MeasureTime frameDescription
peripheral nerve improvement through NCSEvaluated at base time (before treatment) and two months after treatmentNCS assessment of both upper and lower limbs to detect diabetic neuropathy, including measurement tools: latency, amplitude, and conduction velocity for motor and sensory nerves.

Secondary

MeasureTime frameDescription
oxidative stress, and inflammatory parameter levelsEvaluated at baseline (before treatment) and two months after treatmentMeasurement of serum Visfatin, Calprotectin, Malondialdehyde, and HbA1c for all participants

Countries

Iraq

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026