Purpose: Used to increase blood pressure and cardiac output in conditions such as shock, heart failure, and low blood pressure due to various causes.
Administration: Administered intravenously.
Mechanism of Action:
Stimulates dopamine receptors in the body, leading to increased heart rate and contractility, vasodilation in renal and splanchnic circulations, and vasoconstriction in peripheral blood vessels.
Different dosages produce different effects: low doses primarily affect renal and splanchnic vasodilation, intermediate doses increase cardiac output, and high doses result in vasoconstriction.
Indications:
Used in the management of shock (e.g., septic shock, cardiogenic shock).
Employed as a vasopressor in patients with hypotension.
Dosage:
Dosage varies based on the indication, patient's hemodynamic status, and individual response to treatment.
Typically administered as a continuous infusion.
Precautions:
Monitor closely for extravasation as it can cause tissue necrosis.
Use with caution in patients with arrhythmias, hypertension, or peripheral vascular disease.
Contraindications:
Hypersensitivity to dopamine or any components of the formulation.
Pheochromocytoma (a rare tumor of adrenal gland tissue).
Adverse Effects:
Common adverse effects include tachycardia, arrhythmias, hypertension, headache, and nausea.
Extravasation can lead to tissue necrosis.
Special Populations:
Use with caution in elderly patients and those with pre-existing cardiovascular conditions.
May exacerbate underlying arrhythmias or ischemic heart disease.
Storage:
Store at controlled room temperature.
Protect from light.
Drug Interactions:
Concurrent use with monoamine oxidase inhibitors (MAOIs) or tricyclic antidepressants may increase the risk of hypertensive crisis.
Beta-blockers may attenuate the effects of dopamine.
Monitoring:
Continuous monitoring of blood pressure, heart rate, and ECG during administration.
Regular assessment of urine output and renal function.
Patient Counseling:
Inform patients about the purpose of the medication and potential side effects.
Instruct patients to report any adverse reactions or changes in symptoms promptly.