Substance / Medication

Methylthioninium chloride

Overview

Active Ingredient
methylene blue
RxNorm CUI
6878

Indications

Methylene blue injection is indicated for the treatment of pediatric and adult patients with acquired methemoglobinemia.

Labeler: Hikma Pharmaceuticals USA Inc.Updated: 2026-02-09T00:00:00.000ZFull label on DailyMed

Boxed Warning

FDA Black Box Warning

Warnings and Precautions (5.1) Drug Interactions (7.1) [seeand]. Methylene blue injection may cause serious or fatal serotonergic syndrome when used in combination with serotonergic drugs and opioids. Avoid concomitant use of Methylene blue injection with selective serotonin reuptake inhibitors (SSR

Contraindications

When this intervention should not be used

Methylene blue is contraindicated in the following conditions: Warnings and Precautions (5.2) [see] Severe hypersensitivity reactions to methylene blue or any other thiazine dye. Warnings and Precautions (5.3, 5.4) [see] Patients with glucose-6-phosphate dehydrogenase deficiency (G6PD) due to the ri

Indications & Related Conditions

Conditions associated via SNOMED clinical relationships

Administration & Protocol

Dosing, route, and treatment protocol

Detailed dosage and administration information is available in the full FDA drug label.

View full prescribing information on DailyMed

Monitoring & Follow-Up

Biomarkers relevant to this intervention via related conditions

No monitoring biomarkers have been mapped yet. Biomarker-intervention linkages are derived through related conditions and will expand as the knowledge graph grows.

Clinical Trials

15 trials linked to this intervention

15
Total Trials
4
Recruiting
3
With Results

Research Evidence

Published studies and systematic reviews

Sort:
Methylthioninium chloride reverses cognitive deficits induced by scopolamine: comparison with rivastigmine.
Deiana Serena, Harrington Charles R, Wischik Claude M et al. · Psychopharmacology (Berl) · 2009
PMID: 19005644Observational
Extravasation with methylthioninium chloride.
Chebolu Esha, Gnirke Marlis, St Francis Hannah et al. · Clin Toxicol (Phila) · 2024
PMID: 39264422Case Report
Vasoplegic shock in felodipine, tadalafil, lisinopril, fluoxetine and ethanol poisoning responsive to methylthioninium chloride (methylene blue).
Jenrette Jordan, Hatten Benjamin, Simon Mark William · Clin Toxicol (Phila) · 2025
PMID: 40905850Other

Research data from MEDLINE/PubMed

Benefits & Expected Outcomes

Benefits, expected outcomes, efficacy data, and NNT (Number Needed to Treat) are pending physician authorship and evidence review.

Risks & Side Effects

Adverse reaction and safety data for this drug is sourced from the FDA-approved label.

View adverse reactions & drug interactions on DailyMed

Related Symptoms

Symptoms associated with conditions this intervention addresses

No related symptoms have been mapped yet. Symptom linkages are derived through associated conditions.

Alternatives & Comparisons

Alternative treatments, comparison data, and clinical decision support are pending physician authorship.

Medical Disclaimer

This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider regarding any medical condition or treatment plan.

Do not start, stop, or change any treatment without consulting your healthcare provider.

Quick Facts

Type
Substance / Medication
Fully Specified Name
Methylthioninium chloride (substance)
SNOMED CT
6725000
UMLS CUI
C0025746
RxNorm CUI
6878
Labeler
Hikma Pharmaceuticals USA Inc.

Clinical Data

This intervention maps to 4 entities in the Healos knowledge graph.

4
Conditions
0
Biomarkers
0
Specialists
0
Symptoms
15
Clinical Trials

Data is sourced from SNOMED CT, UMLS, and the Healos clinical knowledge graph. Content sections marked as pending require physician authorship. Consult a healthcare provider before starting any treatment.