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Men with erectile dysfunction (ED) can be treated with the drug cenforce 100 mg. Its active component, sildenafil citrate, is a member of the phosphodiesterase type 5 (PDE5) inhibitors pharmacological class. The body's natural reaction to sexual stimulation in men is the release of nitric oxide (NO) into the penile erectile tissue. An enzyme that generates cyclic guanosine monophosphate (cGMP), which relaxes the smooth muscles in the penile blood arteries, is stimulated by nitric oxide. An erection is the result of blood flowing into the penile arteries due to this relaxation.