Methylene Blue Information & Safety

Frequently Asked Questions

Methylene blue is a synthetic compound that has been used in laboratory and clinical settings for many years. It has established medical applications when administered under professional supervision. It is not approved in the UK as a food supplement or general wellness product.

“Off-label” refers to use outside of officially approved medical indications. While methylene blue has recognised clinical uses, other applications discussed online are not formally approved or regulated. Any such use should only be considered under the guidance of a qualified healthcare professional.

No. Methylene blue is not authorised as a food supplement or novel food in the UK. It is not intended for ingestion unless prescribed and supervised by a licensed medical practitioner for an approved indication.

Yes. You should always seek advice from a qualified healthcare professional before using methylene blue, especially if you:

  • Take prescription medication
  • Have a diagnosed medical condition
  • Are pregnant or breastfeeding
  • Have G6PD deficiency
  • Are unsure whether it is appropriate for you

Yes. Methylene blue may interact with certain medications, particularly those that affect serotonin levels, including:

  • SSRIs
  • SNRIs
  • MAO inhibitors
  • Other serotonergic medicines

Combining these substances may increase the risk of serious adverse reactions. Medical advice is essential before use alongside any medication.

Possible side effects may include

  • Headache
  • Nausea
  • Dizziness
  • Changes in blood pressure
  • Temporary blue or green discolouration of urine

Combining these substances may increase the risk of serious adverse reactions. Medical advice is essential before use alongside any medication.

No. Methylene Blue has pharmacological activity, meaning it produces measurable effects in the body. Improper or excessive use may increase the risk of adverse reactions. Only a qualified medical professional can determine appropriate medical dosing when clinically indicated. If you are using Methylene Blue for the first time, start with an extremely low dosage

Long-term safety outside of approved medical settings has not been well established. Ongoing use should only occur under professional supervision.

For accurate, evidence-based guidance, consult:

  • Your GP or specialist
  • The NHS website
  • The MHRA (Medicines and Healthcare products Regulatory Agency)

Important: This information is provided for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making decisions regarding your health.