Tadalafil Eyesight Problems: How Common & What to Do

Takes less than 2 minutes to complete 100% online

At a glance

How Common Are Tadalafil Eyesight Problems?

Vision-related side effects with tadalafil are relatively uncommon. Clinical trials show that visual disturbances affect fewer than 1 in 100 men taking the medicine [4]. The most frequently reported eyesight problems include mild blurred vision, changes in colour perception (especially a blue tinge to vision), and increased sensitivity to light.

These effects are generally dose-related, meaning they are more likely to occur at higher doses such as tadalafil 20mg compared to lower doses like 10mg or the daily 2.5mg or 5mg options. Most men who experience vision changes find them mild and short-lived, resolving within a few hours as the medicine leaves the body [4].

It is important to distinguish between common, mild visual disturbances and rare but serious eye problems. Sudden vision loss in one or both eyes is extremely rare but requires immediate medical attention. This condition, known as non-arteritic anterior ischaemic optic neuropathy (NAION), has been reported very rarely with all PDE5 inhibitors, including tadalafil [4]. If you have previously experienced NAION, tadalafil is not suitable for you.

Why Does Tadalafil Cause Vision Changes?

Tadalafil works by blocking an enzyme called phosphodiesterase type 5 (PDE5), which helps increase blood flow to the penis during sexual stimulation. However, a related enzyme called phosphodiesterase type 6 (PDE6) is found in the retina of the eye and plays a role in how we process light and colour [4].

Tadalafil has some mild activity against PDE6, which can temporarily affect how the retina responds to light. This is why some men notice a blue tinge to their vision, increased brightness, or slight blurring. The effect is usually very mild with tadalafil compared to sildenafil, which has slightly higher PDE6 activity [3][4].

These visual changes do not indicate damage to the eye in most cases. They are a temporary pharmacological effect that fades as the medicine is metabolised and cleared from the body. Tadalafil has a longer half-life than sildenafil, meaning it stays in the system for up to 36 hours, but vision changes typically resolve much sooner, often within a few hours of taking the tablet.

Individual Variation in Response

Not everyone experiences vision changes, and sensitivity varies from person to person. Factors such as dose, individual metabolism, and pre-existing eye conditions can influence whether you notice any eyesight problems. If you have a history of retinal disorders or other eye conditions, it is essential to declare this during your consultation, as your prescriber will assess whether tadalafil is suitable for you [4].

How Long Do Tadalafil Eyesight Problems Last?

Most mild vision changes associated with tadalafil last only a few hours. Because tadalafil can remain effective in the body for up to 36 hours, some men worry that side effects will persist for the same duration. In practice, visual disturbances are usually short-lived and tend to peak around the same time as the maximum concentration of the medicine in the bloodstream, typically within a few hours of taking the dose [4].

If you experience mild blurred vision or a slight colour tinge, it will usually fade naturally without any intervention. Staying hydrated, resting your eyes, and avoiding tasks that require sharp vision (such as driving at night) until the effect passes can help you feel more comfortable.

If vision changes persist beyond a few hours, become more severe, or are accompanied by eye pain or headache, contact your GP or pharmacist for advice. Persistent or worsening symptoms may indicate an underlying issue that needs assessment. Never ignore sudden, complete loss of vision in one or both eyes—this is a medical emergency and requires immediate attention [4].

What you need to know

• Tadalafil eyesight problems are uncommon, affecting fewer than 1 in 100 men, and usually mild and temporary.
• Vision changes occur because tadalafil mildly affects the PDE6 enzyme in the retina, causing colour tinge or blurred vision.
• Most eyesight problems resolve within a few hours; sudden vision loss is extremely rare but needs urgent medical attention.
• Lower doses or switching to a different ED medicine may help if vision changes are troublesome.
• Always declare eye conditions and current medicines during your consultation to ensure tadalafil is safe for you.

Self-Care Tips for Managing Tadalafil Vision Changes

If you notice mild eyesight problems after taking tadalafil, there are several practical steps you can take to manage the symptoms and reduce the likelihood of recurrence. First, consider whether you are taking the lowest effective dose. Many men find that starting with tadalafil 10mg or even the daily 2.5mg or 5mg option reduces the chance of side effects while still providing benefit for erectile dysfunction [4].

Avoid activities that require precise vision, such as driving in low light or operating machinery, until any visual disturbance has completely resolved. If you experience increased sensitivity to light, wearing sunglasses outdoors or dimming indoor lighting can provide relief. Resting your eyes and avoiding screens for a short period may also help.

Do not take more than the recommended dose, and never combine tadalafil with another PDE5 inhibitor or any medicine containing nitrates, nicorandil, or riociguat, as this can cause serious complications [4]. If you are taking other medicines, including over-the-counter products or herbal supplements, declare them during your consultation so your prescriber can check for interactions.

When to Speak to Your Prescriber

If vision changes occur every time you take tadalafil, or if they are troubling you, speak to your prescriber. They may suggest a lower dose, switching to a different PDE5 inhibitor with less PDE6 activity, or exploring alternative treatments for erectile dysfunction. Your comfort and safety are the priority, and there are several effective options available [2][4].

When to Seek Urgent Medical Help for Tadalafil Eyesight Problems

While most vision changes with tadalafil are mild and temporary, certain symptoms require immediate medical attention. Sudden loss of vision in one or both eyes, even if painless, is a medical emergency. This can be a sign of NAION, a rare but serious condition that can lead to permanent vision loss if not assessed and managed promptly [4].

Other warning signs include sudden onset of severe eye pain, seeing flashes of light, a curtain-like shadow across your field of vision, or any rapid deterioration in your ability to see. These symptoms may indicate a retinal problem or other serious eye condition unrelated to tadalafil but requiring urgent evaluation by an eye specialist.

If you experience chest pain during or after sexual activity, an erection lasting more than four hours (priapism), or sudden hearing loss or ringing in the ears, seek urgent medical help. These are rare but serious side effects of PDE5 inhibitors that need immediate treatment [4]. Always call 999 or go to A&E if you are concerned about a sudden, severe change in your health.

When to get urgent help

• Sudden loss of vision in one or both eyes, even if painless
• Severe eye pain, flashes of light, or a curtain-like shadow across your vision
• An erection lasting more than four hours (priapism)
• Chest pain during or after sexual activity
• Sudden hearing loss or ringing in the ears

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

Alternatives to Tadalafil If Eyesight Problems Persist

If you continue to experience troublesome vision changes with tadalafil, several alternative treatments for erectile dysfunction are available. Sildenafil (generic Viagra) is another PDE5 inhibitor with a shorter duration of action, typically lasting around four to six hours. Some men find that the shorter half-life reduces the duration of any side effects, though sildenafil has slightly higher PDE6 activity and may cause similar visual disturbances in some individuals [3].

Vardenafil (generic Levitra) and avanafil (Spedra) are other PDE5 inhibitors with different pharmacological profiles. Avanafil, in particular, is known for its rapid onset and shorter duration, which some men prefer [6][11]. Your prescriber can discuss which option may be most suitable based on your individual response and medical history.

Non-oral treatments are also available if PDE5 inhibitors are not suitable or well-tolerated. Alprostadil, available as a urethral cream (Vitaros) or injection (Caverject), works by a different mechanism and does not typically cause vision changes [7]. Eroxon, a topical gel medical device, is another option that does not require a prescription. A consultation with your GP or a specialist can help identify the best approach for your circumstances [2].

Switching Treatments Safely

Never switch or combine erectile dysfunction medicines without guidance from your prescriber. Taking two PDE5 inhibitors together, or using a PDE5 inhibitor alongside certain other medicines, can cause dangerous drops in blood pressure or other serious side effects. Your prescriber will review your full medical history and current medicines to ensure any change is safe and appropriate for you [2][4].

Choose your treatment

Select from our recommended UK-licensed medications.

Answer quick questions

Select safe UK treatments. Quick answers.

Get it delivered fast

We will deliver direct to you as quickly as tomorrow.

Ready to Speak to a Pharmacist?

Start your journey to better health today.

• Reviewed by UK-based prescribers
• Takes under 3 minutes
• Discreet Packaging