Take Fildena CT 50 approximately 30 minutes to 1 hour before engaging in sexual activity. This allows enough time for the medication to start working effectively.  To ensure Fildena CT 50 works optimally, avoid consuming large or high-fat meals before taking the medication. Such meals can delay the onset of action of Sildenafil Citrate. It’s advisable to avoid alcohol and grapefruit juice when taking Fildena CT 50. Alcohol can reduce the effectiveness of the medication, and grapefruit juice can increase the risk of side effects.