As of my last knowledge update in January 2022, Fildena 150 is primarily known for containing sildenafil citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED). However, there isn't a standard formulation of Fildena 150 that includes duloxetine.

Duloxetine, on the other hand, is a medication commonly used to treat conditions like major depressive disorder, generalized anxiety disorder, fibromyalgia, and chronic musculoskeletal pain. It is not typically used in combination with sildenafil for the treatment of ED.