Vigora 50 mg can cause blurred vision, but it is usually temporary and uncommon. Why this happens Vigora contains sildenafil, a PDE5 inhibitor. It can slightly affect enzymes in the eye (not just in the *****), which may temporarily change how the retina processes light. This can lead to: Blurred vision Mild light sensitivity Bluish or “tinted” vision Difficulty focusing How common is it? It is not very common, but it is a known side effect. Most people who experience it notice it within a few hours of taking the tablet, and it resolves as the drug wears off. Is it dangerous? Usually no, if: It is mild It goes away within hours But you should seek medical help if: Vision becomes suddenly severe or worsens You lose vision in one or both eyes Blurring lasts more than 24 hours You also have eye pain or flashing lights Rarely, serious eye problems (like reduced blood flow to the optic nerve) have been reported with sildenafil, but this is very uncommon. Important practical advice Avoid driving if your vision is blurred after taking it Do not mix with alcohol in excess (can worsen dizziness and vision issues) Don’t combine with other ED medicines If you want, tell me your age and whether you had this symptom already — I can help you judge if it’s a normal side effect or something you should get checked.