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Sildenafil Tablet (generic Viagra)

Sildenafil tablets are a proven, fast-acting treatment for erectile dysfunction (ED) that helps men achieve and maintain an erection sufficient for sexual activity. Sildenafil, also known as the generic version of Viagra, works by increasing blood flow to the penis and boosting confidence in the bedroom.

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December 29, 2025

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Sildenafil Tablet (generic Viagra) – SILDENAFIL (sil DEN a fil) treats erectile dysfunction (ED). It works by increasing blood flow to the penis, which helps to maintain an erection.

Review Title

Category: Erectile Dysfunction

Quick Action
Effective for ED
Convenient
Boosts Confidence

About this medication – Sildenafil Tablet (generic Viagra)

How should you use this medication?

What are the possible side effects of this medicine?

Side effects that you should report to your care team as soon as possible:

Upset stomach

Allergic reactions–skin rash, itching, hives, swelling of the face, lips, tongue, or throat

Hearing loss or ringing in ears

Heart attack–pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded

Heart rhythm changes–fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing

Low blood pressure–dizziness, feeling faint or lightheaded, blurry vision

New or worsening shortness of breath

Prolonged or painful erection

Stroke–sudden numbness or weakness of the face, arm, or leg, trouble speaking, confusion, trouble walking, loss of balance or coordination, dizziness, severe headache, change in vision

Sudden vision loss in one or both eyes Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

Facial flushing or redness

Headache

Nosebleed

Runny or stuffy nose

Trouble sleeping

What may interact with this medicine?

Our pharmacists will check to see if this medication will cause any interactions with the information in your profile.

Do not take this medication with any of the following:

Certain medications for blood pressure Other medications may affect the way this medication works. Talk with your care team about all of the medications you take. They may suggest changes to your treatment plan to lower the risk of side effects and to make sure your medications work as intended.

Nitrates, such as amyl nitrite, isosorbide dinitrate, isosorbide mononitrate, nitroglycerin

Riociguat

Vericiguat This medication may also interact with the following:

Bosentan

Frequently Asked Questions for Sildenafil Tablet (generic Viagra)

What It Is

Sildenafil is a prescription-only medication used to treat erectile dysfunction (ED) in men. Available in various strengths, including 25mg, 50mg, and 100mg, Sildenafil helps men who struggle with ED to regain their ability to achieve a satisfying erection by enhancing blood flow to the penis.

How It Works

Sildenafil works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which breaks down a compound called cGMP. cGMP is essential for relaxation of the blood vessels in the penis, allowing them to expand and fill with blood, thus helping men achieve an erection. It only works when the user is sexually aroused, allowing for a natural sexual experience.

Directions for Use

Dosage: The standard recommended dose is 50mg, but this can be adjusted to 25mg or 100mg based on individual needs and effectiveness.
Administration: Take one tablet orally with water, about 30 to 60 minutes before sexual activity.
Frequency: Do not take more than one tablet in a 24-hour period.
Best Time to Take: It is most effective when taken on an empty stomach, as food can delay the onset of action.
Duration: Sildenafil’s effects last up to 4-5 hours, providing ample time for sexual activity.

Side Effects

Common side effects of Sildenafil include:

Headaches
Dizziness
Flushing
Stuffy nose
Indigestion

Rare side effects may include:

Vision changes
Chest pain or discomfort
Painful or prolonged erection (priapism)

Warnings and Precautions

Do not take Sildenafil if:

You have recently had a heart attack, stroke, or have serious heart or liver problems.
You are taking nitrate medications for chest pain (e.g., nitroglycerin).
You are allergic to Sildenafil or any of its ingredients.

Who Can Take Sildenafil?

Sildenafil is suitable for most men over the age of 18 who experience erectile dysfunction. However, it is not recommended for men with certain health conditions, including severe heart problems, low blood pressure, or liver disease. Always consult with a healthcare professional before starting treatment.