Comparative Pharmacology
Head-to-head clinical analysis: ANASTROZOLE versus AROMASIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ANASTROZOLE versus AROMASIN.
ANASTROZOLE vs AROMASIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Anastrozole is a selective non-steroidal aromatase inhibitor. It inhibits the conversion of androgens to estrogens in peripheral tissues, thereby reducing circulating estradiol levels. It has no intrinsic progestogenic, androgenic, or estrogenic activity.
Irreversible steroidal aromatase inhibitor that binds to the aromatase enzyme, leading to its permanent inactivation via covalent modification. This reduces estrogen biosynthesis (primarily in peripheral tissues) by inhibiting conversion of androgens to estrogens.
1 mg orally once daily
25 mg orally once daily after a meal
None Documented
None Documented
Terminal elimination half-life: ~46 hours (range 30–60 hours). Clinically, steady-state reached after ~10 days; once-daily dosing maintains therapeutic concentrations.
Clinical Note
moderateAnastrozole + Digoxin
"Anastrozole may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateAnastrozole + Digitoxin
"Anastrozole may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateAnastrozole + Deslanoside
"Anastrozole may decrease the cardiotoxic activities of Deslanoside."
Clinical Note
moderateAnastrozole + Acetyldigitoxin
"Anastrozole may decrease the cardiotoxic activities of Acetyldigitoxin."
Terminal elimination half-life is approximately 24 hours (range 20-30 hours) for exemestane, supporting once-daily dosing. Steady state achieved within 7 days.
Primarily hepatic metabolism (85%): N-dealkylation, hydroxylation, and glucuronidation. Renal excretion of metabolites: ~10% unchanged drug in urine. Fecal elimination: ~10% as metabolites.
Primarily hepatic metabolism via CYP3A4 and aldoketoreductases, with 60-70% of metabolites excreted renally and 30-40% via feces. Less than 1% excreted unchanged in urine.
Category D/X
Category C
Aromatase Inhibitor
Aromatase Inhibitor