Naftopidil DiHCl (CAS No 57149-08-3) is a pharmacological compound primarily used in biomedical research focused on urological and cardiovascular disorders Originating as an alpha-1 adrenergic receptor antagonist it targets specific pathways to reduce smooth muscle contraction particularly in the prostate and bladder aiding in conditions like benign prostatic hyperplasia Its mechanism also involves modulation of blood pressure by affecting vascular resistance In vitro studies often show activity in the nanomolar to low micromolar range Typical applications include experiments using cell models such as prostate or bladder smooth muscle cells as well as animal studies for assessing efficacy and safety in drug screening scenarios Experimental concentrations typically depend on the specific research design allowing for flexibility in studying its pharmacokinetics and therapeutic potential