Methylene Blue 50mg
Methylene blue 50mg is a prescription oxidation-reduction agent used primarily to treat methemoglobinemia, a condition in which the blood cannot carry oxygen effectively. It works by helping restore hemoglobin's ability to transport oxygen. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.
Compare all Methylene Blue options →
Select Quantity *
30-day supply · $3.00/capsule
How It Works
- Select your medication
- Licensed providers review & prescribe
- Our licensed U.S. pharmacists fill your prescription
- Delivered to you as soon as the next day
Price: $90.00
HSA/FSA Eligible*Doctor visit fee & delivery cost not included in price. Refills at provider discretion.
Pharmacist Support
Fast Shipping
Licensed U.S. Pharmacy
Buy Methylene Blue 50mg Capsules Online
Methylene blue is an oxidation-reduction agent used to treat methemoglobinemia and certain drug-induced blood disorders.
Methylene Blue 50mg Quick Facts
| Drug class | Oxidation-reduction agent |
|---|---|
| Treats | Methemoglobinemia, drug-induced methemoglobinemia |
| Form | Capsule |
| Typical dosing | Take 1 capsule by mouth daily. |
| Prescription required | Yes — prescription only |
What Is Methylene Blue 50mg?
Methylene blue is a medication classified as an oxidation-reduction agent. It is used to treat methemoglobinemia, a blood disorder in which an abnormal form of hemoglobin (methemoglobin) prevents red blood cells from delivering oxygen to tissues. Methylene blue works by converting methemoglobin back to normal hemoglobin, restoring the blood's oxygen-carrying capacity. It is available by prescription only and should be used exactly as directed by your healthcare provider.
What Does Methylene Blue 50mg Treat?
Acquired methemoglobinemia
Drug-induced methemoglobinemia
Chemical-induced methemoglobinemia
Diagnostic dye procedures (as directed by a provider)
Other uses as determined by your prescriber
Methylene Blue 50mg Dosage
Take orally as prescribed; dosing is individualized by your provider.
Commonly 50–300 mg daily in divided doses for methemoglobinemia, per prescriber direction.
Do not exceed the prescribed dose.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Methylene Blue 50mg Side Effects
Common side effects
- Blue-green discoloration of urine or stool
- Nausea
- Vomiting
- Abdominal pain
- Headache
- Dizziness
- Sweating
- Altered taste
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Serotonin syndrome (agitation, confusion, rapid heart rate, fever)
- Hemolytic anemia (especially with G6PD deficiency)
- Severe allergic reactions (rash, swelling, difficulty breathing)
- Paradoxical worsening of methemoglobinemia at high doses
- Chest pain or irregular heartbeat
Warnings & Interactions
Do not use with serotonergic drugs (SSRIs, SNRIs, MAOIs) — risk of serious serotonin syndrome
Contraindicated in G6PD deficiency — risk of hemolytic anemia
Contraindicated with known hypersensitivity to methylene blue or thiazine dyes
May cause harm in pregnancy — discuss risks with your provider
Can discolor urine, stool, and skin blue-green (harmless but expected)
Use caution in severe kidney impairment
High doses may worsen, rather than improve, methemoglobinemia
Tell your prescriber about all medications, supplements, and health conditions before starting methylene blue 50mg.
Talk to U.S.-Based Support
Our licensed pharmacy team in Boca Raton, Florida — real people, no overseas call centers.