Tadalista CT 20 can potentially cause vision changes, though this is rare. Here's a detailed explanation: Why Vision Changes Can Occur Tadalista CT 20 is a combination medication containing: Tadalafil – a PDE5 inhibitor that increases blood flow to the penis. Dapoxetine – a selective serotonin reuptake inhibitor (SSRI) that delays ejaculation. Tadalafil can rarely affect the eyes by altering blood flow in the retina or affecting the optic nerve, leading to: Blurred vision Changes in color perception (mostly blue/green) Increased sensitivity to light These side effects are uncommon and usually temporary, resolving once the medication wears off. When to Seek Immediate Help Contact a doctor immediately if you experience: Sudden loss of vision in one or both eyes Persistent blurred vision or double vision Pain in the eyes accompanied by headache or nausea This could indicate a rare but serious condition called NAION (non-arteritic anterior ischemic optic neuropathy). Precautions Men with pre-existing eye conditions, such as retinitis pigmentosa, glaucoma, or optic nerve problems, should not take Tadalista CT 20 without a doctor’s supervision. Avoid self-medicating, especially at high doses. Report any unusual visual symptoms immediately.   Vision changes are rare but possible with Tadalista CT 20, mainly due to the Tadalafil component. Most effects are temporary, but sudden or severe vision issues require urgent medical attention. If you want, I can make a full list of all rare but serious side effects of Tadalista CT 20 so you can know what to watch for.