What is the interaction between Hydroxychloroquine (HCQ) and Vitamin B6 (Pyridoxine)?

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Last updated: May 6, 2025View editorial policy

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From the Guidelines

Hydroxychloroquine and vitamin B6 do not have any established therapeutic combination or interaction that is commonly prescribed. You may be referring to hydroxychloroquine, which is an antimalarial and anti-inflammatory medication used to treat conditions like lupus and rheumatoid arthritis. Hydroxychloroquine is not mentioned in the provided evidence, which focuses on the treatment of drug-susceptible tuberculosis 1. However, vitamin B6 (pyridoxine) is mentioned as a supplement to be given with isoniazid (INH) to prevent neuropathy, with a recommended dose of 25-50 mg/day for adults 1. If you're taking hydroxychloroquine, it's generally safe to take vitamin B6 supplements, but there's no specific medical reason to combine them. Vitamin B6 is important for brain development, immune function, and metabolism of protein, carbs, and fats. The recommended daily allowance for adults is 1.3-1.7 mg. Some key points to consider:

  • Hydroxychloroquine requires prescription and monitoring for potential side effects like retinal damage
  • Vitamin B6 supplements are generally safe, but high doses can cause nerve damage
  • If you're considering taking these substances together, consult with your healthcare provider first, as they can provide guidance specific to your medical condition and needs 1.

From the Research

Hydroxychloroquine and Vitamin B6

  • There is no direct evidence in the provided studies regarding the relationship between hydroxychloroquine and vitamin B6.
  • The studies focus on the efficacy and safety of hydroxychloroquine in treating COVID-19, its potential mechanisms, and its use in patients with glucose-6-phosphate dehydrogenase deficiency.
  • None of the studies mention vitamin B6 in relation to hydroxychloroquine or COVID-19 treatment 2, 3, 4, 5, 6.

Efficacy and Safety of Hydroxychloroquine

  • Some studies suggest that hydroxychloroquine may be effective against COVID-19 when provided early in the outpatient setting 2.
  • However, other studies have found that hydroxychloroquine is not effective in reducing mortality in patients with COVID-19 and may be associated with an increased risk of adverse events 3, 6.
  • The use of hydroxychloroquine in patients with glucose-6-phosphate dehydrogenase deficiency is a concern due to the risk of hemolysis 4.

Mechanisms and Adverse Effects

  • Hydroxychloroquine has immunomodulatory and antiviral mechanisms, but its use in COVID-19 treatment is still controversial due to potential adverse effects such as cardiotoxicity 5.
  • The safety of hydroxychloroquine in COVID-19 treatment and other diseases has been evaluated in several studies, with some finding an increased risk of adverse events 6.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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