Metiltioninio Cloruro S.A.L.F.

Methylthioninium chloride, the active ingredient in Metiltioninio Cloruro S.A.L.F., is a phenothiazine derivative presented as an injectable solution for intramuscular or intravenous use. It reduces methemoglobin to functional hemoglobin and serves as an antidote for methemoglobinemia, cyanide poisoning, and certain drug‑induced toxicities. GNH USA supplies Metiltioninio Cloruro S.A.L.F. as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Methylthioninium chloride is employed in the management of disorders where abnormal hemoglobin or toxic metabolites are present. - Methemoglobinemia: restores normal oxygen‑carrying capacity of hemoglobin. - Cyanide poisoning: facilitates detoxification of cyanide ions. - Ifosfamide‑induced encephalopathy: mitigates neurotoxic effects of the chemotherapy metabolite. - Urinary tract infections: used as a diagnostic/therapeutic agent to highlight bacterial presence.

Methylthioninium chloride may cause a range of adverse reactions.

Common Side Effects: - Nausea: mild to moderate gastrointestinal upset. - Headache: transient cranial discomfort. - Dizziness: occasional light‑headedness. - Blue‑green discoloration of urine: harmless coloration. - Mild hypertension: temporary rise in blood pressure. - Abdominal discomfort: mild cramping.

Serious or Rare Side Effects: - Hemolysis in G6PD‑deficient patients: can lead to severe anemia. - Anaphylaxis: rare but potentially life‑threatening allergic reaction. - Paradoxical methemoglobinemia: worsening of the condition. - Severe hypertension or hypertensive crisis. - Serotonin syndrome when combined with serotonergic agents. - Cardiac arrhythmias: irregular heart rhythms.

When using methylthioninium chloride, consider the following safety measures. - G6PD deficiency: avoid use due to risk of hemolysis. - Pregnancy: safety not established; use only if clearly needed. - Breastfeeding: unknown excretion; weigh benefits against potential risks. - Serotonergic drugs: monitor for serotonin syndrome. - Blood pressure: observe for significant elevations. - Store at ambient temperature: keep in original container, protect from light and moisture.

Methylthioninium chloride can interact with several medication classes.

Major Interactions (Avoid): - Serotonergic agents (SSRIs, MAOIs, tramadol): risk of serotonin syndrome. - Phenothiazine antipsychotics: additive central nervous system effects.

Moderate Interactions (Monitor Closely): - Anticoagulants: may enhance bleeding tendency. - High‑dose vitamin C: can reduce drug efficacy. - Drugs causing oxidative stress: increase hemolysis risk in susceptible patients.