Taking more than 100mg of Viagra (sildenafil) in a 24-hour period is generally not recommended. Exceeding the recommended dosage significantly increases your risk of experiencing side effects.
Cardiovascular Risks
Higher doses can strain your heart. You might experience an irregular heartbeat, chest pain (angina), or even a heart attack, especially if you have pre-existing cardiovascular conditions. Always consult your doctor before taking Viagra, particularly if you have heart problems or high blood pressure.
Visual Disturbances
Increased dosages can intensify visual side effects. You may experience blurred vision, changes in color perception, or increased sensitivity to light. These effects are usually temporary, but seeking medical advice is crucial if they persist or worsen.
Headaches and Other Side Effects
Common side effects like headaches, flushing, nasal congestion, and indigestion can become more severe and prolonged with higher doses. Severe headaches warrant immediate medical attention.
Priapism
A serious risk of exceeding the recommended dose is priapism – a prolonged and painful erection lasting more than four hours. This requires immediate medical attention as it can cause permanent damage.
Dosage Summary
| 25-50 | Low | Mild headaches, flushing |
| 100 | Moderate | Increased risk of headaches, visual disturbances, indigestion |
| >100 | High | Significant increase in severity of side effects, potential for serious cardiovascular events, priapism |
Seeking Medical Advice
If you experience any concerning side effects after taking Viagra, seek medical assistance immediately. Never adjust your dosage without first consulting your doctor. They can help determine the appropriate dosage and address any underlying health concerns.


