Fildena Double 200 contains 200mg of Sildenafil Citrate, a high-dose medication used to treat severe erectile dysfunction (ED). While effective, this dosage carries a higher risk of side effects and interactions, so it’s important to be cautious about what you consume with it—including grapefruit juice. Since Fildena Double 200 already contains a high amount of Sildenafil, any interaction that increases its potency can become dangerous. The extended presence of the drug in your system may also lead to unpredictable reactions, especially if you have underlying health conditions.