Fildena CT 100 mg works by blocking the PDE5 enzyme, which helps maintain higher levels of cyclic guanosine monophosphate (cGMP). This allows the smooth muscles in penile blood vessels to relax, increasing blood flow to the penis during sexual stimulation. As a result, it can help men achieve and maintain a firmer erection. The medication does not produce an erection without sexual arousal. The effect of sildenafil usually begins within 30–60 minutes, though the timing may vary depending on factors such as food intake, metabolism, and individual response. https://www.genericday.com/fildena-ct-100-mg.html