Description
What is Tadalafil?
Tadalafil (Cialis) is a selective PDE5 inhibitor with the longest half-life in its class (~17.5hr, duration up to 36hr). Prevents cGMP degradation in smooth muscle, sustaining NO-mediated vasodilation. FDA-approved for erectile dysfunction, BPH, and pulmonary arterial hypertension (PAH/Adcirca). CAS 171596-29-5.








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