October 10, 2015
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(exenatide) Extended-release for Injectable Suspension



Exenatide extended-release causes an increased incidence in thyroid C -cell tumors at clinically relevant exposures in rats compared to controls. It is unknown whether BYDUREON causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans, as human relevance could not be determined by clinical or nonclinical studies. BYDUREON is contraindicated in patients with a personal or family history of MTC and in patients with Multiple Endocrine Neoplasia syndrome type 2 (MEN 2). Routine serum calcitonin or thyroid ultrasound monitoring is of uncertain value in patients treated with BYDUREON. Patients should be counseled regarding the risk and sympto ms of thyroid tumors [see CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS, and Nonclinical Toxicology].


BYDUREON (exenatide extended-release for injectable suspension) is supplied as a sterile powder to be suspended in diluent and administered by subcutaneous injection. Exenatide is a 39-amino acid synthetic peptide amide with an empirical formula of C 184H282N50O60S and a molecular weight of 4186.6 Daltons. The amino acid sequence for exenatide is shown below.


BYDUREON is a white to off-white powder that is available in a dosage strength of 2 mg exenatide per vial or per pen. Exenatide is incorporated in an extended-release microsphere formulation containing the 50:50 poly(D,L-lactide-co-glycolide) polymer (37.2 mg per dose) along with sucrose (0.8 mg per dose). The powder must be suspended in the diluent prior to injection.

The diluent for the BYDUREON vial is supplied in a prefilled syringe within each single -dose tray. The diluent for the BYDUREON Pen is contained within each single -dose pen. Each configuration contains sufficient diluent to deliver 0.65 mL. The diluent is a clear, colorless to pale-yellow solution composed of carboxymethylcellulose sodium (19 mg), polysorbate 20 (0.63 mg), sodium phosphate monobasic monohydrate (0.61 mg), sodium phosphate dibasic heptahydrate (0.51 mg), sodium chloride (4.1 mg), and water for injection. Sodium h ydroxide may be added during manufacture of BYDUREON Pen for pH adjustment.

What are the possible side effects of Bydureon (Bydureon)?

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

Stop using this medication and call your doctor at once if you have a serious side effect such as:

  • swelling in your neck or throat (enlarged thyroid), hoarse voice, trouble swallowing or breathing;
  • swelling, weight gain, feeling short of breath, urinating less than usual or not at all;
  • drowsiness, confusion, mood changes, increased thirst, diarrhea;
  • dull pain in your middle or lower...

Read All Potential Side Effects and See Pictures of Bydureon »

Last reviewed on RxList: 3/19/2015
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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