Tadaga 5mg works by inhibiting the PDE5 enzyme, which restricts blood flow to the genital tissues. By blocking this enzyme, tadalafil promotes the production of cyclic guanosine monophosphate (cGMP), which relaxes blood vessels and smooth muscles in the genital area. This relaxation facilitates better blood circulation, enabling natural and spontaneous erections when sensually aroused. For men with BPH, it reduces the tension in the prostate and bladder muscles, improving urinary flow and reducing discomfort.