Fildena 50 does not necessarily need water to be effective, depending on the formulation you have: Standard Fildena 50 mg tablets (the regular oral tablets) should be swallowed with water. This helps the tablet dissolve in the stomach and ensures proper absorption, so it works effectively. Fildena Super Active 50 mg (the orodispersible / sublingual formulation) is designed to dissolve in the mouth without water. You can place it on your tongue, let it dissolve, and it will be absorbed through the mucous membranes, usually  Fildena 50 faster than the regular tablet. Key Points: Regular Fildena  swallow with water → onset ~30–60 min. Fildena Super Active → dissolves in mouth  , no water needed. Effectiveness depends on proper dosage, sexual stimulation, and following doctor’s instructions, not just water intake. If you want, I can make a small table showing Fildena vs. Fildena Super Active on water requirement, onset time, and duration — it makes it much easier to see the differences.