Isosulfan Blue Injection, Solution
FDA Label NDC 72078-070

Isosulfan blue injection 1% upon subcutaneous administration, delineates lymphatic vessels draining the region of injection. It is an adjunct to lymphography in: primary and secondary lymphedema of the extremities; chyluria, chylous ascites or chylothorax; lymph node involvement by primary or secondary neoplasm; and lymph node response to therapeutic modalities.

Isosulfan blue injection 1% is to be administered subcutaneously, one-half (1/2) mL into three (3) interdigital spaces of each extremity per study. A maximum dose of 3 mL (30 mg) isosulfan blue is, therefore, injected.

Discard unused portion.

To be prepared and administered by a healthcare provider only.

For subcutaneous injection only. Do not inject by any other route. As a precaution, always wear gloves.

Inspect isosulfan blue injection for particulate matter and discoloration prior to administration.

Figure A shows an annotated drawing of the 3 mL syringe. Appearance may differ for the 1 mL syringe.

Figure A (Image 01)

• 1)Grip the syringe at the luer lock collar and remove the tip cap from the prefilled syringe by twisting the cap anticlockwise and pulling upwards (See Figure B)


Figure B (Image 02)

Figure B
• 2)Hold the luer lock collar and attach the needle to the syringe with a firm clockwise twisting motion (See Figure C).


Figure C (Image 03)

Figure C
• 3)Remove the needle sheath with a straight pull. Do not twist the sheath as the needle may become loosened from the syringe (See Figure D)


Figure D (Image 04)

Figure D
• 4)Hold the syringe with the attached needle in an upright position. Prime the syringe by tapping the syringe barrel and moving the plunger stopper carefully forward to the first graduation mark (this may expel air and excess solution) (See Figure E)


Figure E (Image 05)

Figure E
• 5)Administer one-half (1/2) mL subcutaneously, into three (3) interdigital spaces of each extremity per study.
• 6)Dispose of the used supplies in an approved sharps container in accordance with local hospital procedures.

1% clear dark blue, sterile, non-pyrogenic aqueous solution (isosulfan blue) for subcutaneous administration available as:

• 5 mL single-dose vial
• 1 mL single-dose pre-filled syringe
• 3 mL single-dose pre-filled syringe

Isosulfan blue injection 1% is contraindicated in those individuals with known hypersensitivity to triphenylmethane or related compounds.

Life threatening anaphylactic reactions (respiratory distress, shock, angioedema) have occurred after isosulfan blue injection 1% administration. Reactions are more likely to occur in patients with a history of bronchial asthma, allergies, drug reactions or previous reactions to tri-phenylmethane dyes. Monitor patients closely for at least 60 minutes after administration of isosulfan blue injection 1%. Trained personnel should be available to administer emergency care including resuscitation.

The admixture of isosulfan blue injection 1% (with local anesthetics (i.e. lidocaine)) in the same syringe results in an immediate precipitation of 4% to 9% drug complex. Use a separate syringe to administer a local anesthetic.

Isosulfan blue injection 1% interferes with measurements of oxygen saturation in peripheral blood by pulse oximetry and can cause falsely low readings. The interference effect is maximal at 30 minutes and minimal generally by 4 hours after administration. Arterial blood gas analysis may be needed to verify decreased arterial partial pressure of oxygen.

Isosulfan blue injection 1% may also cause falsely elevated readings of methemoglobin by arterial blood gas analyzer. Therefore, cooximetry may be needed to verify methemoglobin level.

Hypersensitivity Reactions: Case series report an overall incidence of hypersensitivity reactions in approximately 2% of patients. Life threatening anaphylactic reactions have occurred. Manifestations include respiratory distress, shock, angioedema, urticaria, pruritus. A death has been reported following administration of a similar compound employed to estimate the depth of a severe burn. Reactions are more likely to occur in patients with a personal or family history of bronchial asthma, significant allergies, drug reactions or previous reactions to triphenylmethane dyes [see Warnings and Precautions (5)].

Laboratory Tests: Isosulfan blue injection 1% interferes with measurements of oxygen saturation by pulse oximetry and of methemoglobin by gas analyzer [see Warnings and Precautions (5)].

Skin: transient or long-term (tattooing) blue coloration.

No drug interactions have been identified with isosulfan blue injection 1%.

It is not known whether this drug is excreted in human milk.

Because many drugs are excreted in human milk, caution should be exercised when isosulfan blue injection 1% is administered to a nursing mother.

Safety and effectiveness of isosulfan blue injection 1% in children have not been established.

Do not exceed indicated recommended dosage as overdosage levels have not been identified for isosulfan blue injection 1%.

The chemical name of isosulfan blue injection 1% is N-[4- [[4-(diethylamino)phenyl] (2,5-disulfophenyl) methylene]-2,5-cyclohexadien-1-ylidene]-N-ethylethanaminium hydroxide, inner salt, sodium salt. Its structural formula is:

ISOSULFAN BLUE

Chemical Structure (Edbeada8 1521 4961 8fc1 Fd9794cfa35b 01)

Isosulfan blue injection 1% is a clear dark blue, sterile, non-pyrogenic aqueous solution for subcutaneous administration. Phosphate buffer in sterile, pyrogen free water is added in sufficient quantity to yield a final pH of 6.8 to 7.4. Each mL of solution contains 10 mg isosulfan blue, 6.6 mg sodium monohydrogen phosphate and 2.7 mg potassium dihydrogen phosphate. Each mL of isosulfan blue injection contains 2 mg of sodium and less than 5 mg of phosphorus. The solution contains no preservative. Isosulfan blue injection 1% is a contrast agent for the delineation of lymphatic vessels.

Following subcutaneous administration, isosulfan blue injection 1% binds to serum proteins and is picked up by the lymphatic vessels. Thus, the lymphatic vessels are delineated by the blue dye.

Up to 10% of the subcutaneously administered dose of isosulfan blue injection 1% is excreted unchanged in the urine in 24 hours in humans.

Long-term studies in animals have not been performed to evaluate the carcinogenic potential of isosulfan blue injection 1%. Reproduction studies in animals have not been conducted and, therefore, it is unknown if a problem concerning mutagenesis or impairment of fertility in either males or females exists.

Pregnancy Category C. Animal reproduction studies have not been conducted with isosulfan blue injection 1%. It is not known whether isosulfan blue injection 1% can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Isosulfan blue injection 1% should be given to a pregnant woman only if clearly needed.

Isosulfan Blue Injection 1% is supplied as a 5 mL single-dose vial, 1 mL and 3 mL pre-filled syringe containing 1% clear dark blue, aqueous solution in a phosphate buffer prepared by appropriate manufacturing to be sterile and pyrogen-free.

NDC 67457-220-05
50 mg/5 mL (10 mg/mL)
carton containing 6 x 5 mL single-dose vials

NDC 72078-069-01
10 mg/mL
carton containing 1 x 1 mL pre-filled syringe

NDC 72078-070-03
30 mg/3 mL (10 mg/mL)
carton containing 1 x 3 mL pre-filled syringe

Storage: Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.] Avoid excessive heat.

Discard unused portion.

Inform patients that urine color may be blue for 24 hours following administration of isosulfan blue injection 1%.

Manufactured for:
Mylan Institutional LLC
Morgantown, WV 26505 U.S.A.

Manufactured by:
Mylan Institutional
Galway, Ireland

Revised: 12/2025
MI:ISOSIJ:R7

NDC 72078-069-01

Isosulfan Blue Injection 1%
10 mg/mL

For Lymphography

For Subcutaneous Use Only

Rx only     1 x 1 mL Single-Dose Pre-filled Syringe

Sterile. Non-Pyrogenic. Single-Dose Container.
Contains no preservatives.
Not for Multiple-Use.
Discard Unused Portion.

Each mL contains:
Isosulfan Blue . . . . . . . . . . . . . . . . . . . . . . . . . 10 mg
Sodium monohydrogen phosphate. . . . . . . . 6.6 mg
Potassium dihydrogen phosphate . . . . . . . . 2.7 mg

Consult Accompanying Prescribing Information Before Administering Drug.

Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.] Avoid excessive heat.

Manufactured for:
Mylan Institutional LLC
Morgantown, WV 26505 U.S.A.

Manufactured by:
Mylan Institutional
Galway, Ireland

MI:069:1C:R1

50107245

Mylan.com

Isosulfan Blue Injection 1% Carton Label 10 mg/ml (Image 07)

NDC 72078-070-03

Isosulfan Blue Injection 1%
30 mg/3 mL (10 mg/mL)

For Lymphography

For Subcutaneous Use Only

Rx only     1 x 3 mL Single-Dose Vials

Sterile. Non-Pyrogenic. Single-Dose Container.
Contains no preservatives.
Not for Multiple-Use.
Discard Unused Portion.

Each mL contains:
Isosulfan Blue . . . . . . . . . . . . . . . . . . . . . . . . . 10 mg
Sodium monohydrogen phosphate. . . . . . . . 6.6 mg
Potassium dihydrogen phosphate . . . . . . . . 2.7 mg

Consult Accompanying Prescribing Information Before Administering Drug.

Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.] Avoid excessive heat.

Manufactured for:
Mylan Institutional LLC
Morgantown, WV 26505 U.S.A.

Manufactured by:
Mylan Institutional
Galway, Ireland

MI:070:1C:R1

50107246

Mylan.com

Isosulfan Blue Injection 1% Carton Label 30 mg/3 mL (Image 06)