Fildena 100 mg, which contains sildenafil citrate as its active ingredient, typically has a duration of action of approximately 4 to 6 hours. However, the duration of action can vary from person to person based on individual factors such as metabolism, age, liver function, and other medications being taken.

After taking Fildena 100mg, sildenafil is rapidly absorbed into the bloodstream, and its effects usually start within 30 to 60 minutes, reaching peak levels within 1 to 2 hours. During this time, sildenafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which allows for increased blood flow to the penis, resulting in an erection when sexually stimulated.

While the effects of Fildena 100 mg typically last for several hours, it's important to note that the medication does not continuously produce an erection for the entire duration of action. Instead, it helps facilitate an erection when sexual stimulation occurs within the window of effectiveness.

It's essential to follow the dosage instructions provided by your healthcare provider and not to exceed the recommended dose of Fildena 100 mg to minimize the risk of side effects and maximize effectiveness. If you have any questions or concerns about the duration of action or proper use of Fildena 100 mg, it's best to consult with your healthcare provider for personalized advice and guidance.