TADAL (Tadalafil)

PDE-5 inhibitor for erectile function research — up to 36-hour duration of action.

TADAL contains tadalafil 20 mg, a potent phosphodiesterase type 5 (PDE-5) inhibitor. During sexual arousal, nitric oxide increases cGMP levels; tadalafil blocks PDE-5 from degrading cGMP, relaxing smooth muscle in penile cavernous tissue and enhancing blood flow for sustained erection. It works only with sexual stimulation and is known for its extended action window — up to 36 hours. Studied for erectile dysfunction, pulmonary hypertension research, and vascular function. For research and reference — prescription medicine in most jurisdictions.