Fildena 150 mg should not be combined with nitrates or other PDE5 inhibitors, as this can cause a significant drop in blood pressure. Inform your healthcare provider about all medications and supplements you are taking. Fildena 150 mg contains sildenafil citrate, which is a phosphodiesterase type 5 (PDE5) inhibitor. By blocking the PDE5 enzyme, sildenafil increases levels of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the penis.
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