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Chronic Kidney Disease:

In controlled trials, patients experienced greater risks for death, serious adverse cardiovascular reactions, and stroke when administered erythropoiesis-stimulating agents (ESAs) to target a hemoglobin level of greater than 11 g/dL.

No trial has identified a hemoglobin target level, ESA dose, or dosing strategy that does not increase these risks [see WARNINGS AND PRECAUTIONS].

Use the lowest OMONTYS dose sufficient to reduce the need for red blood cell (RBC) transfusions [see WARNINGS AND PRECAUTIONS].


Peginesatide is an ESA that is a synthetic, pegylated dimeric peptide comprised of two identical, 21-amino acid chains covalently bonded to a linker derived from iminodiacetic acid and β-alanine. Peginesatide is manufactured as an acetate salt. The dimeric peptide (approximate MW 4,900 daltons) is covalently linked to a single lysine-branched bis-(methoxypoly(ethylene glycol)) (PEG) chain (approximate MW 40,000 daltons). The structure is provided in Figure 1; peginesatide has no amino acid sequence homology to erythropoietin. The empirical formula is C2031H3950N62O958S6 (free base). The total molecular weight is approximately 45,000 daltons.

Figure 1: Structure of peginesatide acetate

OMONTYS® (peginesatide) Structural Formula Illustration

OMONTYS (peginesatide) Injection is formulated as a sterile, colorless to slightly yellow preservative-free solution and a sterile, colorless to slightly yellow preserved solution for intravenous or subcutaneous administration.

Single use, preservative-free injectable solutions of OMONTYS in vials and pre-filled syringes are supplied in multiple strengths. Each 0.5 mL vial or pre-filled syringe contains peginesatide, 23.5 mg sorbitol, 1.5 mg sodium phosphate monobasic (dihydrate), 0.06 mg sodium phosphate dibasic, 0.02 mg polysorbate 20, and water for injection, USP. Sodium hydroxide added to adjust pH. The pH is 6.0 ± 0.3.

Multiple use, preserved injectable solutions of OMONTYS in vials are supplied in two fill volumes: 1 mL and 2 mL. Each mL contains 10 mg peginesatide, 47 mg sorbitol, 5 mg phenol, 1.5 mg L-methionine, 0.6 mg glacial acetic acid, and water for injection, USP. Sodium hydroxide added to adjust pH. The pH is 5.4 ± 0.5.

What are the possible side effects of peginesatide (Omontys)?

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.

Contact your doctor if you feel weak, lightheaded, or short of breath, or if your skin looks pale. These may be signs that your body has stopped responding to this medication.

Peginesatide can increase your risk of life-threatening heart or circulation problems, including heart attack or stroke. This risk will increase the longer you use peginesatide. Seek emergency medical help if you have symptoms of heart or...

Read All Potential Side Effects and See Pictures of Omontys »

Last reviewed on RxList: 12/19/2012
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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