Comparative Pharmacology
Head-to-head clinical analysis: ENTADFI versus JALYN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ENTADFI versus JALYN.
ENTADFI vs JALYN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Combination of a 5α-reductase inhibitor (finasteride) and a phosphodiesterase 5 inhibitor (tadalafil). Finasteride inhibits type II 5α-reductase, preventing conversion of testosterone to dihydrotestosterone, reducing prostate growth. Tadalafil inhibits PDE5, increasing cGMP in smooth muscle, causing relaxation of the prostate and bladder neck.
Jalyn is a combination of dutasteride, a 5α-reductase inhibitor that inhibits the conversion of testosterone to dihydrotestosterone (DHT), and tamsulosin, an α1-adrenoceptor antagonist that relaxes smooth muscle in the prostate and bladder neck.
5 mg orally once daily.
1 capsule (0.5 mg dutasteride/0.4 mg tamsulosin) orally once daily, 30 minutes after the same meal each day.
None Documented
None Documented
Finasteride: terminal half-life ~6-8 hours (range 4-12 h) in young adults, 8 hours in elderly. Tadalafil: terminal half-life ~17.5 hours (range 11-28 h), supporting once-daily dosing.
Dutasteride: 5 weeks (t½ ∼3-5 weeks) due to high tissue binding and slow elimination; Tamsulosin: 9-13 hours (t½ ∼9-13 h) in healthy subjects, prolonged in elderly (∼14-15 h).
ENTADFI (finasteride 5 mg and tadalafil 5 mg) is a fixed-dose combination. Finasteride is excreted 57% in feces (as metabolites) and 39% in urine (<1% as unchanged). Tadalafil is excreted primarily as metabolites, with 61% in feces and 36% in urine; <0.001% of dose is excreted unchanged in urine.
Dutasteride: 40% renal, 60% fecal as metabolites; Tamsulosin: 76% renal (9% unchanged), 24% fecal as metabolites.
Category C
Category C
5-Alpha Reductase Inhibitor and PDE5 Inhibitor
5-Alpha Reductase Inhibitor/Alpha-1 Blocker Combination