Byetta (Exenatide Injection) Drug Information: Description, User Reviews, Drug Side Effects, Interactions

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May 26, 2012

Byetta

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Diabetes mellitus is a condition in which the body does not produce enough insulin or the insulin that is produced is ineffective. Insulin is produced and secreted by the pancreas and is needed for the proper storage and utilization of nutrients (glucose, proteins, and fat) by the cells of the body. Insulin allows nutrients to enter the cells of the body. For example, insulin allows cells to remove glucose from the blood, and the glucose is used to generate the energy that is necessary to fuel the activities of the cells. When insulin is absent or ineffective and the cells receive inadequate amounts of glucose, the body releases more glucose into the blood in an attempt to overcome the block to glucose entering the cells. The additional glucose cannot penetrate the cells, of course, and the glucose levels in the blood rise. High levels of blood and urine glucose is what causes the symptoms and signs of diabetes. For more, please re...

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Byetta

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BYETTA®
(exenatide) Injection

DRUG DESCRIPTION

BYETTA (exenatide) is a synthetic peptide that was originally identified in the lizard Heloderma suspectum. Exenatide differs in chemical structure and pharmacological action from insulin, sulfonylureas (including D-phenylalanine derivatives and meglitinides), biguanides, thiazolidinediones, alpha-glucosidase inhibitors, amylinomimetics and dipeptidyl peptidase-4 inhibitors.

Exenatide is a 39-amino acid peptide amide. Exenatide has the empirical formula C₁₈₄H₂₈₂N₅₀O₆₀S and molecular weight of 4186.6 Daltons. The amino acid sequence for exenatide is shown below.

H-His-Gly-Glu-Gly-Thr-Phe-Thr-Ser-Asp-Leu-Ser-Lys-Gln-Met-Glu-Glu-Glu-Ala-Val-Arg-Leu -Phe-Ile-Glu-Trp-Leu-Lys-Asn-Gly-Gly-Pro-Ser-Ser-Gly-Ala-Pro-Pro-Pro-Ser-NH2

BYETTA (exenatide injection) is supplied for SC injection as a sterile, preserved isotonic solution in a glass cartridge that has been assembled in a pen-injector (pen). Each milliliter (mL) contains 250 micrograms (mcg) synthetic exenatide, 2.2 mg metacresol as an antimicrobial preservative, mannitol as a tonicity-adjusting agent, and glacial acetic acid and sodium acetate trihydrate in water for injection as a buffering solution at pH 4.5. Two prefilled pens are available to deliver unit doses of 5 mcg or 10 mcg. Each prefilled pen will deliver 60 doses to provide for 30 days of twice daily administration (BID).

What are the possible side effects of exenatide (Byetta)?

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 exenatide and call your doctor at once if you have a serious side effect such as:

urinating less than usual or not at all;
drowsiness, confusion, mood changes, increased thirst;
swelling, weight gain, feeling short of breath; or
severe pain in your upper stomach spreading to your back, nausea and vomiting, loss of appetite,...

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What are the precautions when taking exenatide injection (Byetta)?

Before using exenatide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, severe stomach/intestinal disorders (e.g., digestion problems such as gastroparesis, or pancreatitis).

You may experience blurred vision, headache, dizziness, or drowsiness due to extremely low or high blood sugar levels. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages since alcohol...

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Last reviewed on RxList: 12/15/2010
This monograph has been modified to include the generic and brand name in many instances.