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Methylene Blue

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Methylene Blue

Methylene Blue Injection, USP 1%


Methylene Blue (methylene blue injection) Injection, USP is a sterile solution of methylene blue (methylene blue injection) in water for injection suitable for parenteral administration.

Methylene Blue structural formula illustration

C16H18ClN3S                   MW = 319.86

Each mL of solution contains 10 mg of methylene blue (methylene blue injection) .

What are the possible side effects of methylene blue (Urolene Blue)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • severe nausea, vomiting, or stomach pain;
  • pain in your chest or behind your breast bone;
  • pale or blue skin;
  • high fever, fast or pounding heartbeats, trouble breathing; or
  • confusion, feeling like you might pass out.

Less serious side effects may include:

  • mild bladder...

Read All Potential Side Effects and See Pictures of Methylene Blue »

Last reviewed on RxList: 7/22/2008
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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