The main purpose of the drug fildena 100 is to cure erectile dysfunction (ED) in males. Sildenafil citrate, a strong inhibitor of phosphodiesterase type 5 (PDE5) that controls blood flow in the penis, is included in it. Nitric oxide is produced in the penile erectile tissue when a man is sexually excited. This triggers the activation of guanylate cyclase, an enzyme that produces cyclic guanosine monophosphate (cGMP). An erection is produced when blood flows into the erectile tissue due to the relaxation of the smooth muscles in the penile arteries caused by this chemical messenger.

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