Dobutrex, Dobutamine Hydrochloride Injection
Generic Name
Dobutamine
Manufacturer
Various generic manufacturers globally (e.g., Lilly, Baxter)
Country
Global
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Description
Overview of the medicine
Dobutamine is a direct-acting inotropic agent whose primary activity results from stimulation of the beta-1 adrenoceptors of the heart, resulting in increased cardiac contractility and cardiac output. It is used for short-term treatment of cardiac decompensation due to depressed contractility, which may occur as a result of organic heart disease or cardiac surgical procedures.
Uses & Indications
Dosage
Adults
Initial dose: 0.5-1 mcg/kg/min; usual range: 2.5-20 mcg/kg/min by continuous IV infusion. Titrate to desired hemodynamic response.
Elderly
No specific dosage adjustment based solely on age, but monitor carefully.
Renal_impairment
No specific dosage adjustment required, but monitor carefully due to potential for accumulation of metabolites in severe renal impairment.
How to Take
For intravenous use only. Administer as a continuous infusion via an infusion pump. Dilute prior to administration. Do not mix with sodium bicarbonate or other alkaline solutions.
Mechanism of Action
Dobutamine selectively stimulates beta-1 adrenergic receptors, primarily increasing myocardial contractility and stroke volume, leading to increased cardiac output. It has relatively mild chronotropic, alpha-adrenergic, and beta-2 adrenergic effects at therapeutic doses. It increases myocardial contractility without significantly increasing heart rate or systemic vascular resistance.
Pharmacokinetics
Onset
1-10 minutes
Excretion
Mainly via urine as metabolites.
Half life
Approximately 2 minutes
Absorption
Administered intravenously, rapid onset of action.
Metabolism
Rapidly metabolized in the liver and other tissues by catechol-O-methyltransferase (COMT) to 3-O-methyl dobutamine and by conjugation.
Side Effects
Contraindications
- •Idiopathic hypertrophic subaortic stenosis (IHSS).
- •Patients with known hypersensitivity to dobutamine or to any component of the formulation.
Drug Interactions
MAOIs
Risk of hypertensive crisis.
Beta-blockers
May blunt the inotropic response to dobutamine.
Alpha-blockers
May unmask beta-1 and beta-2 adrenergic effects.
General anesthetics (e.g., cyclopropane, halothane)
Increased risk of ventricular arrhythmias.
Storage
Store at controlled room temperature 20-25°C (68-77°F). Protect from light. Do not freeze. Diluted solutions are stable for 24-48 hours under refrigeration or at room temperature.
Overdose
Symptoms include excessive beta-stimulation: hypertension, tachycardia, myocardial ischemia, ventricular fibrillation, and possibly vasodilation. Management involves reducing the rate of administration or discontinuing the infusion. Correct hypokalemia if present. Gastric lavage and activated charcoal are generally not indicated. In case of serious arrhythmias, a beta-adrenergic blocking agent may be considered.
Pregnancy & Lactation
Pregnancy Category B. Use only if clearly needed. It is not known whether dobutamine is excreted in human milk. Exercise caution when administering to a nursing woman.
Frequently Asked Questions
Common questions about this medicine
Pack Sizes
Shelf Life
Refer to manufacturer's specific product labeling, typically 2-3 years.
Availability
Hospitals, Clinics, Pharmacies (with prescription)
Approval Status
FDA approved
Patent Status
Generic available
WHO Essential Medicine
YesAlternative Medicines in Bangladesh
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Global Brand Names
International brand names for this medicine
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