Vardena-fil is more potent and more selective than sildenafil at inhibiting phosphodiesterase-5.

Sildenafil Citrate, the main substituent of Fildena 
helps in enjoyable the blood vessels to make the smooth circulation of blood in the erectile tissues of the 
male genital with inhibiting PDE-5 enzyme. After induction, the nitric 
oxide deactivates the enzyme and increases the blood circulation in the male reproductive organ which enhances 
the erectile operate. This may occur as 
a result of physical health and the other medications taken by the patients.
Patients with coronary heart surgeries, stroke or any heart disease are additionally 
restrained to take Fildena pills. However, after taking the pills also, it will likely be obligatory for the sexual 
arousal to get an erection. It is essential to know if you face any side effects and take 
actions towards it with the help of a doctor’s session. 
The overdose of the pill will also be the reason to site any side effects.
The most commonly reported hostile results with sildenafil are headache, flushing 
and dyspepsia.