Fildena 150 mg contains Sildenafil Citrate and is used to treat erectile dysfunction by increasing blood flow to the penis. It is typically taken 30 to 60 minutes before sexual activity and is effective for about 4 to 6 hours. While common side effects include headaches and flushing, serious side effects require immediate medical attention. Always consult your healthcare provider for personalized advice and to ensure safe use, especially if you have other health conditions or are taking multiple medications.