Fildena works by inhibiting the action of the enzyme PDE5, which helps to relax the blood vessels in the ***** and increase blood flow, leading to improved erectile function. It does not provide ***** stimulation on its own but enhances the natural response to ***** stimulation. Fildena is available in various strengths, such as Fildena 25, Fildena 50, Fildena 100, Fildena 150, and Fildena Extra Power 150, indicating the amount of Sildenafil citrate contained in each tablet. The strength prescribed may depend on factors such as the severity of ED, individual response, and the healthcare professional's recommendation. It's important to note that Fildena, like other medications containing Sildenafil citrate, should be taken under the supervision and prescription of a qualified healthcare professional. It is typically taken orally, usually about 30 minutes to 1 hour before ***** activity, and its effects can last for several hours.