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Exenatide

BYETTA

Pronunciation: ex-EN-a-tide (bye-AY-ta)

Exenatide ballicule: receptor binding, kinetics and half-life diagram
Mechanism of action: Exenatide ballicule
Exenatide mascot mnemonic cartoon
Visual mnemonic: Exenatide mascot
“X’in tide”

What it isShort-acting GLP-1 receptor agonist; type 2 diabetes.

Why this oneIts short action targets postprandial glucose, complementing basal insulin.

What limits itGI intolerance limits use; renally cleared, so avoid below eGFR 30. Pancreatitis remains an important warning.

Exenatide molecular structure (skeletal formula)
Molecular structure: Exenatide

FDA-approved for

FDA label

FDA dosingPopulationStartTargetMax
Type 2 diabetes mellitus (adjunct to diet/exercise)Adults5 mcg BID SC10 mcg BID SC after 1 mo10 mcg BID

Titration Increase to 10 mcg BID after 1 month of therapy

Renal Not recommended in severe renal impairment (CrCl <30) or ESRD; use with caution in renal transplant

Hepatic Undefined

Two doses daily before the two main meals, ≥6 h apart; do not dose after meals

Instructions

Available strengths

Contraindications

Cautions

Adverse reactions

Pregnancy Limited data; use during pregnancy only if potential benefit justifies risk to fetus

Lactation No human data; present in mouse milk — clinical relevance unclear

Cost

Exenatide (BYETTA)
Strength#/mogeneric $/unitCostPlus
300 mcg/1.2 mLinjper unitnot offered
600 mcg/2.4 mLinjper unitnot offered
NADAC is a voluntary CMS survey of what retail community pharmacies pay for the drugs they stock. Exenatide is administered under clinical supervision and dispensed outside retail pharmacies, so it rarely appears on surveyed invoices.

Generic entry2024

⚠ BOXED WARNING

Classes and tags

Clinical profile

Therapeutic safety burden2 / 4
Overdose danger1 / 4
Weight-gain liability0 / 4
Sedation liability0 / 4
QT / Torsades0 / 4
Direct muscarinic antagonism0 / 4
Embryofetal risk2 / 4

Legacy pregnancy categoryC

Defining liabilityGI intolerance, gallbladder disease and rare pancreatitis; hypoglycemia is uncommon without insulin or sulfonylureas.

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