Hemostasis Physiology and Clinical correlations by Dr Faiza.pdf
LASIX - Furosemide(loop diuretics)
1.
2. TABLE OF CONTENTS:
• Chemical class
• pharmacological class
• therapeutic class
• pregnancy category
• Chemistry
• Physio-chemical Properties
• Solubility
• storage temperature
9. Pharmacodynamics:
Mechanism of action:
Furosemide, a loop diuretic, inhibits water reabsorption in the nephron by blocking
the sodium-potassium-chloride cotransporter( Na+/K+/2CL- ) in the thick ascending
limb of the loop of Henle.This is achieved through competitive inhibition at the
chloride binding site on the cotransporter, thus preventing the transport of sodium
from the lumen of the loop of Henle into the basolateral interstitium. Consequently,
the lumen becomes more hypertonic while the interstitium becomes less hypertonic,
which in turn diminishes the osmotic gradient for water reabsorption throughout the
nephron. Because the thick ascending limb is responsible for 25% of sodium
reabsorption in the nephron, furosemide is a very potent diuretic.
15. INTERACTION WITH ACEBUTALOL:
It is a beta1-blocker
• TYPE: Pharmacodynamic Interaction
• Mechanism: Acebutalol increases serum potassium while
furosemide decrease serum potassium
• Severity:moderate
• Management: Monitor serum potassium closely
16. INTERACTION WITH CISAPRIDE:
It is a prokinetic agent
TYPE: Pharmacodynamic Interaction
Mechanism:Pharmacodynamic synergism(Both reduce
calcium level ,so may cause prolonging of QTc intervals)
Severity: Severe
Management: Contraindicated
17. INTERACTION WITH ETHACRYNIC ACID:
It is a loop diuretic
Type: Pharmacodynamic interaction
Mechanism:Pharmacodynamic synergism(both are
diuretics,so ethacrynic acid potentiate ototoxicity of
Furosemide )
Severity: severe
management : contraindicated
18. INTERACTION WITH AVANAFIL:
It is a phosphodiesterase-5 enzyme Inhibitor
Type: Pharmacodynamic interaction
Mechanism:Pharmacodynamic synergism(avanafil is
phosphodiestrase-5 inhibitor, causes vasodilation ,causes
hypotension, so BP may reduce below normal)
Severity: moderate
management : change in time of administration