What is Viagra (Sildenafil)? Uses, Benefits, Side Effects & Buying Guide in Thailand

What is Viagra?

Viagra is a medication that effectively treats male erectile dysfunction (ED).

The History of Viagra: Its Origin and Developer

Viagra (Sildenafil) was developed and launched by Pfizer, a world-renowned pharmaceutical company. Founded in 1849 and headquartered in New York, Pfizer engages in the research, development, production, and sales of various medicines and vaccines globally. In 1998, Pfizer introduced Viagra, a revolutionary product for treating erectile dysfunction in men.

What Does Viagra Contain?

The active ingredient in Viagra is Sildenafil, a type of drug classified as a phosphodiesterase type 5 (PDE5) inhibitor. It works by blocking the PDE5 enzyme, enhancing the effect of nitric oxide, relaxing smooth muscles, and increasing blood flow to the penis, thereby improving erectile function.

Besides Sildenafil, Viagra tablets also contain excipients such as ethylcellulose, calcium phosphate, sodium hydroxide, maltodextrin, and sodium lauryl sulfate.

These ingredients mainly provide stability, solubility, and other pharmaceutical properties.

Viagra is a prescription-only medication and must be taken under the supervision of a doctor. Always consult a physician before use.

Benefits of Viagra

Improves Erectile Function: Helps increase blood flow to the penis, enabling stronger and more sustained erections.

Enhances Sexual Satisfaction: Restores confidence and intimacy in sexual activity, improving overall satisfaction.

Boosts Self-Esteem: ED can negatively affect mental health and confidence.

Viagra helps alleviate stress and anxiety, improving psychological well-being.

Clinically Proven Safety: Backed by years of research and clinical trials, Viagra is generally safe and effective when used in appropriate doses under medical supervision.

Buying Viagra in Thailand

In Thailand, Viagra (Sildenafil) is a prescription-only medication.  Through EDD Health Thailand, you will be connected with licensed doctors who can assess your condition online.

Every prescription is issued by a qualified physician, ensuring that treatment is personalized, safe, and medically appropriate.

Always buy from authorized pharmacies to ensure authenticity and safety.

Price of Viagra

The standard dose is 100mg per tablet. Prices may vary by clinic or pharmacy, but typically cost around THB ฿2,000 for 4 tablets.

Buy Viagra in Thailand

How to Use Viagra

• Doctor’s Guidance: Always follow medical advice for dosage and suitability.

• Dosage: Determined by your individual needs.

• Timing: Take orally 30–60 minutes before sexual activity.

• Food: Avoid heavy fatty meals as they may delay absorption.

• Sexual Stimulation Required: Viagra does not increase libido; arousal is necessary.

• Side Effects Monitoring: Stop use and consult a doctor if adverse effects occur.

Duration of Effect

Viagra’s effectiveness varies by individual. Factors include:

• Dosage: Higher doses may last longer but increase side-effect risks.

• Individual Differences: Age, metabolism, and health status influence duration.

• Food Intake: High-fat meals may reduce effectiveness.

• Other Medications/Conditions: Certain drugs (like nitrates) may affect performance.

Who Can Take Viagra?

Viagra is not suitable for everyone. It is intended for men with erectile dysfunction, but should be avoided in cases such as:

- Cardiovascular diseases (heart attack, stroke, arrhythmia).

- Abnormal blood pressure (too high or too low).

- Concurrent use of nitrate drugs.

- Chronic illnesses affecting the liver, kidneys, or retina.

- Always consult a doctor to determine suitability.

Interactions with Other Medications

Certain drugs can interact dangerously with Viagra, such as:

• Nitrates (e.g., nitroglycerin) → may cause severe blood pressure drops.

• Alpha-blockers (e.g., Doxazosin, Tamsulosin) → risk of low blood pressure.

• Antifungal agents (e.g., Ketoconazole, Itraconazole) → alter metabolism of Viagra.

• HIV medications (e.g., Ritonavir, Indinavir) → increase Sildenafil levels.Always disclose all medications to your doctor.

Side Effects of Viagra

Common side effects include:

- Headache

- Indigestion or nausea

- Flushing (redness in the face)

- Nasal congestion or runny nose

- Dizziness or low blood pressure

Rare: visual changes (blurred vision, altered color perception)

If severe or persistent side effects occur, stop use and seek medical help.

Alternatives to Viagra

Other PDE5 inhibitors include:

• Tadalafil (Cialis): Long-lasting, up to 36 hours (“weekend pill”).

  
  

• Vardenafil (Levitra): Similar mechanism, different individual responses.All alternatives should only be used under medical guidance.

What is Viagra?

Common Misconceptions About Viagra

Increases Libido: False. Viagra only aids physical erection response.

Works for All ED Causes: Not always; psychological and medical factors may affect outcomes.

Contraceptive: False. Viagra does not prevent pregnancy or STDs.

Dangerously Unsafe: When used correctly, it is generally safe.