How to Take Viagra: Chew or Swallow for Best Results? - Urology

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When taking Viagra, should it be chewed and then swallowed, or should it be swallowed whole with water? Which method is most effective? Thank you!

Tianren, 60~69 year old female. Ask Date: 2018/05/02

Dr. Xu Wencang reply Urology


Taking Viagra after meals or high-fat foods can affect its absorption.
It is recommended to take Viagra at least two hours after a meal.

Reply Date: 2018/05/02

More Info


When it comes to taking Viagra (sildenafil), the recommended method is to swallow the tablet whole with a glass of water. Chewing or crushing the tablet is not advised, as this can alter the way the medication is absorbed in the body and may affect its efficacy. Viagra is designed to be taken orally and is formulated to dissolve in the gastrointestinal tract, where it is then absorbed into the bloodstream.

Viagra works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which leads to increased blood flow to the penis when a man is sexually stimulated. This mechanism helps to achieve and maintain an erection. The medication typically takes about 30 minutes to 1 hour to start working, and its effects can last for up to 4 to 5 hours. It is important to note that sexual arousal is necessary for Viagra to work; the medication does not cause an erection without sexual stimulation.

In terms of timing, it is best to take Viagra on an empty stomach or after a light meal. High-fat meals can delay the absorption of the medication, which may result in a slower onset of action. Therefore, if you plan to take Viagra, consider the timing of your meals to optimize its effectiveness.

Regarding dosage, Viagra is available in various strengths, including 25 mg, 50 mg, and 100 mg. It is essential to follow your healthcare provider's instructions regarding the appropriate dosage for you. Starting with a lower dose is often recommended, especially for those who are new to the medication or have certain health conditions. If the initial dose is not effective, your doctor may adjust the dosage based on your response and tolerance.

It is also crucial to be aware of potential side effects. Common side effects of Viagra include headaches, flushing, nasal congestion, indigestion, and dizziness. In rare cases, more severe side effects can occur, such as sudden vision loss or hearing loss. If you experience any of these serious side effects, it is important to seek medical attention immediately.

Additionally, Viagra should not be taken with certain medications, particularly nitrates (often prescribed for chest pain), as this combination can lead to a dangerous drop in blood pressure. Always inform your healthcare provider about all medications you are taking, including over-the-counter drugs and supplements.

In summary, for the best results when taking Viagra, swallow the tablet whole with water, avoid high-fat meals before taking it, and adhere to the prescribed dosage. If you have any concerns or questions about using Viagra, consult your healthcare provider for personalized advice and guidance.

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