What Happens If I Take 100mg Of Sildenafil?

So, you’re curious about what would happen if you took 100mg of sildenafil, huh? Well, buckle up and get ready for an informative ride! Sildenafil, commonly known as Viagra, is a medication used to treat erectile dysfunction. It works by increasing blood flow to certain areas of the body, including the penis. But what happens if you exceed the recommended dosage? In this article, we’ll explore the potential effects and risks of taking 100mg of sildenafil, so you can make an informed decision about your sexual health.

Overview of Sildenafil

What is sildenafil?

Sildenafil, commonly known by its brand name Viagra, is a medication primarily used to treat erectile dysfunction (ED) in men. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. Sildenafil helps improve blood flow to the penis, enabling men to achieve and sustain an erection during sexual stimulation.

How does sildenafil work?

When you are sexually aroused, the blood vessels in your penis relax, allowing more blood to flow into it. However, in cases of ED, there are certain factors that inhibit this process. Sildenafil works by inhibiting the action of PDE5, an enzyme that reduces the levels of a chemical called cyclic guanosine monophosphate (cGMP). By blocking PDE5, sildenafil helps increase the levels of cGMP, allowing for smoother muscle relaxation and improved blood flow to the penis.

Why is sildenafil prescribed?

Sildenafil is prescribed by healthcare professionals to treat erectile dysfunction and improve sexual performance in men. It is a widely recognized and effective treatment option for those struggling with impotence. Additionally, sildenafil has been approved to treat other medical conditions, such as pulmonary arterial hypertension (PAH), a condition that affects the blood vessels in the lungs.

Recommended dosage of sildenafil

The recommended starting dose of sildenafil for most men is 50mg, taken approximately one hour before sexual activity. However, dosages can vary depending on individual needs and tolerances. Your healthcare provider may adjust the dosage accordingly, with the maximum recommended dose being 100mg. It is essential to follow your doctor’s instructions regarding dosage and never exceed the prescribed amount.

Potential Effects of Taking 100mg of Sildenafil

Increased risk of side effects

While sildenafil is generally well-tolerated, taking a higher dosage of 100mg may increase the risk of experiencing side effects. It is important to note that side effects can vary from person to person, and not everyone will experience them. However, exceeding the recommended dosage may heighten the likelihood and intensity of these adverse effects.

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Enhanced potency and duration

Taking 100mg of sildenafil may enhance the drug’s potency and duration of action. As a result, you may experience a more robust and sustainable erection during sexual activity. This can be beneficial for individuals who have not achieved satisfactory results with lower dosages. However, it is crucial to consult with your healthcare provider before increasing the dosage to ensure it is safe and appropriate for you.

Potential for priapism

One of the potential effects of taking 100mg of sildenafil is an increased risk of priapism. Priapism is a prolonged and painful erection that can last for more than four hours. While priapism is a rare side effect, it can be a medical emergency and requires immediate attention to prevent permanent damage to the penis. If you experience an erection that lasts longer than four hours after taking sildenafil, seek medical help right away.

Increased cardiovascular risks

Taking a higher dosage of sildenafil, such as 100mg, may increase the cardiovascular risks associated with the medication. Sildenafil can cause a modest decrease in blood pressure, and in rare cases, it may lead to serious cardiovascular events, such as heart attack or stroke. Individuals with pre-existing cardiovascular conditions or those taking certain medications should exercise caution when using sildenafil, especially at higher dosages.

Side Effects of Taking 100mg of Sildenafil


Headaches are a common side effect of sildenafil, and taking 100mg may increase the likelihood and severity of headaches. If you experience a headache after taking the medication, it is usually mild and should resolve on its own. However, if the headache persists or becomes severe, it is recommended to consult with your healthcare provider.


Flushing, characterized by a warm or red face, is another common side effect of sildenafil. Taking 100mg may intensify this flushing sensation, causing increased redness or warmth in the face and upper body. Flushing is usually harmless and temporary, but if it becomes bothersome or persists, speak to your doctor.

Upset stomach

Some individuals may experience an upset stomach or indigestion after taking sildenafil. This side effect is usually mild and can be mitigated by taking the medication with food. However, taking 100mg may increase the likelihood of experiencing this gastrointestinal discomfort. If you find your stomach upset persists or worsens, it is advisable to consult your healthcare provider.

Nasal congestion

Nasal congestion, or a stuffy or runny nose, is another common side effect of sildenafil. Taking 100mg may heighten this symptom, causing increased nasal congestion. It is typically mild and temporary, but if it becomes bothersome or persistent, inform your doctor.

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Dizziness is a possible side effect of sildenafil, and taking 100mg may increase the chances of experiencing this symptom. It is important to be cautious and avoid activities that require mental alertness, such as driving or operating heavy machinery, if dizziness occurs after taking sildenafil. If dizziness persists or worsens, seek medical advice.

Back pain

Back pain is a reported side effect of sildenafil, although it is relatively uncommon. Taking 100mg may slightly increase the likelihood of experiencing back pain, which is usually mild and temporary. If back pain persists or becomes severe, consult your healthcare provider.

Vision changes

Some individuals may notice mild vision changes, such as blurred vision or a blue tinge to their vision, when taking sildenafil. While these visual disturbances are typically temporary and harmless, taking a higher dosage may amplify these effects. If you experience significant changes in your vision or if they persist, seek medical attention for further evaluation.


Although uncommon, some individuals may develop a skin rash after taking sildenafil. Taking 100mg may slightly increase the risk of developing this allergic reaction. If you notice a rash or any other skin changes, discontinue the medication and consult your doctor.


As mentioned earlier, priapism is a rare but serious side effect that can occur after taking sildenafil. Taking a higher dose, such as 100mg, may slightly increase the risk of developing priapism. If you experience a prolonged and painful erection lasting longer than four hours, it is crucial to seek immediate medical attention to prevent potential complications.

Management of Side Effects

Seeking immediate medical attention

If you experience any severe or concerning side effects after taking sildenafil, such as chest pain, difficulty breathing, or signs of an allergic reaction, it is essential to seek immediate medical attention. These symptoms may indicate a serious adverse reaction and require prompt evaluation and treatment.

Modifying dosage

If you are experiencing bothersome but non-life-threatening side effects after taking 100mg of sildenafil, it may be worth considering a lower dosage. Consult with your healthcare provider to determine if a lower dose could provide benefits while minimizing side effects.

Exploring alternative treatments

If you find that the side effects of sildenafil, even at a lower dosage, are intolerable or if the medication is ineffective, there are alternative treatment options available. Your healthcare provider can discuss other medications, therapies, or lifestyle changes that may be suitable for you.

Priapism and Its Potential Consequences

What is priapism?

Priapism is a rare but serious condition characterized by a prolonged and painful erection lasting longer than four hours. It can occur as a rare side effect of sildenafil, especially when higher dosages are taken. Priapism is not related to sexual arousal and can lead to permanent damage to the penile tissues if left untreated.

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Potential complications

If priapism is not treated promptly, it can lead to potential complications, such as tissue damage, scarring, and erectile dysfunction. It is crucial to seek immediate medical attention if you experience a prolonged erection to minimize the risk of long-term consequences.

Emergency treatment for priapism

Emergency treatment for priapism typically involves draining the excess blood that is causing the prolonged erection. Your healthcare provider may use various techniques, such as aspiration or medication injections, to relieve the condition. Seeking immediate medical attention is crucial to prevent further complications associated with priapism.

Cardiovascular Risks and Precautions

Interaction with nitrates

Sildenafil can interact with certain medications, particularly nitrates, commonly used to treat heart conditions such as angina. The combination of sildenafil and nitrates can cause a severe drop in blood pressure, leading to a life-threatening situation. It is vital to inform your healthcare provider of all medications you are taking, including nitrates, to avoid potential interactions.

Hypotensive effects

Sildenafil can cause a modest decrease in blood pressure, which can be amplified when taking higher dosages. Individuals with low blood pressure or those who are already taking blood pressure-lowering medications should exercise caution when using sildenafil. It is important to monitor blood pressure regularly and seek medical advice if you experience any significant drops in blood pressure.

Cardiac risks

Sildenafil may carry a slightly increased risk of cardiovascular events, such as heart attack or stroke, particularly in individuals with pre-existing cardiovascular conditions. If you have a history of heart disease, stroke, or other cardiac issues, it is essential to discuss the risks and benefits of using sildenafil with your healthcare provider before taking the medication.

Special precautions for individuals with cardiovascular conditions

Individuals with specific cardiovascular conditions, such as severe heart failure or unstable angina, may be advised against using sildenafil altogether. It is crucial to disclose your complete medical history to your healthcare provider to assess the suitability and safety of sildenafil in your specific case.

Other Considerations

Potential drug interactions

Sildenafil can interact with various prescription and over-the-counter medications, including certain antibiotics, antifungal drugs, and HIV medications. It is important to inform your healthcare provider about all medications you are currently taking to avoid potential drug interactions that could impact the effectiveness or safety of sildenafil.

Pre-existing conditions

Individuals with certain medical conditions, such as liver or kidney disease, may require dose adjustments or closer monitoring when using sildenafil. It is crucial to disclose any pre-existing medical conditions to your healthcare provider to ensure the safe and appropriate use of sildenafil.

Consulting a healthcare professional

Before starting or modifying any medication regimen, including sildenafil, it is crucial to consult with a healthcare professional. They can provide personalized advice, consider potential risks and benefits, and guide you in making informed decisions about your health.


Understanding the potential effects of taking 100mg of sildenafil is essential in making informed decisions about medication use. While this higher dosage may enhance potency and duration, it also carries an increased risk of side effects, such as headache, flushing, upset stomach, nasal congestion, and dizziness. Additionally, individuals need to be aware of the potential for priapism, a serious condition manifested by a prolonged and painful erection, as well as the increased cardiovascular risks associated with sildenafil. It is crucial to seek immediate medical attention in case of severe side effects or priapism and to exercise caution if you have underlying cardiovascular conditions. Always follow the recommended dosage prescribed by your healthcare provider and consult them if you have any concerns or questions about the use of sildenafil.