Men with erectile dysfunction can be treated with the drug fildena. Fildena contains sildenafil citrate as its active component. The main function of the PDE5 enzyme is to control cyclic guanosine monophosphate. More blood can enter the penis because of the relaxation of the smooth muscles in the penile blood arteries brought on by elevated cGMP levels. A result of this increased blood flow is an erection. During sexual stimulation, this system is crucial for obtaining and sustaining an erection. It is recommended to take fildena orally, with water, 30 to 60 minutes before engaging in sexual activity. Headache, flushing, upset stomach, stuffy nose, diarrhea, and dizziness are a few possible mild fildena side effects. To prevent overdose symptoms, do not take more than one pill of the prescribed medication within 24 hours of the preceding dose.