Fildena 150 mg (sildenafil 150 mg), vision changes can occur because sildenafil affects PDE-6 in the retina. They are more likely with higher doses; clinical data show abnormal vision was substantially more common at 100 mg than at 50 mg. Typical effects are blurred vision, increased light sensitivity, or a temporary blue/color tinge, and they are usually mild and transient. D DailyMed +1 When can they happen? They can occur after taking the tablet while the sildenafil is active, rather than only immediately after swallowing it. If you notice blurred or altered vision, don't drive or operate machinery until your vision is normal. N nhs.uk Fildena 150 mg is above the usual maximum recommended sildenafil dose of 100 mg for erectile dysfunction, so I would not recommend taking 150 mg without a doctor's direction. Higher doses increase the likelihood of adverse effects. D DailyMed When is it an emergency? If you develop sudden loss or significant decrease of vision in either eye, stop taking sildenafil and seek immediate medical attention. Rare cases of NAION (a form of optic-nerve injury that can cause permanent vision loss) have been reported with sildenafil. D DailyMed If you've already taken Fildena 150 mg and are currently experiencing a vision change, tell me exactly what you're seeing (blurred, blue/green tint, bright lights, dark spot, partial/complete loss) and how long ago you took it.