Viagra – Sildenafil 100mg


Half-life: 3-4 hours
Classification: PDE5 Inhibitor
Adult Dose: 10-20 mg per day
Acne Manifestation: No
Water Rentention: No
High Blood Pressure: POSSIBLE
Hepatoxicity: NO
Aromatization: NO
Detection Time: 1 Day
Molecular Formula: C22H30N6O4S
Molecular Weight: 474.576 gm/mol


What is it and how is it used?

Sildenafil is classified under a group of medications known as phosphodiesterase type 5 (PDE5) inhibitors. Its mechanism involves relaxing the blood vessels in the penis, facilitating increased blood flow when sexual arousal occurs. Sildenafil is effective only in the presence of sexual stimulation and should not be taken by individuals without erectile dysfunction or by women.

Sildenafil is specifically designed for men experiencing erectile dysfunction, commonly referred to as impotence. This condition occurs when a man is unable to attain or sustain a firm and erect penis suitable for sexual activity.

Precautions before use:

Do not take Sildenafil if you:

  • Are using medications called nitrates, as this combination may lead to a potentially dangerous decrease in blood pressure. Inform your doctor if you are taking drugs prescribed for angina pectoris or chest pain. Seek guidance from your doctor or pharmacist if uncertain.
  • Use drugs known as nitric oxide donors, like amyl nitrite poppers, as the combination can also result in a potentially hazardous drop in blood pressure.
  • Are allergic or hypersensitive to sildenafil or any other Sildenafil ingredients.
  • Have severe heart or liver problems.
  • Recently experienced a stroke or heart attack, or have low blood pressure.
  • Have specific rare inherited eye diseases such as retinitis pigmentosa.
  • Previously suffered vision loss due to non-arteritic anterior ischaemic optic neuropathy (NAION).

Special care considerations for Sildenafil:

Inform your doctor if you:

  • Have conditions like sickle cell anaemia, leukaemia, or multiple myeloma.
  • Possess a penis deformity or Peyronie’s Disease.
  • Encounter heart problems, as your doctor needs to assess if your heart can endure the added strain of sexual activity.
  • Currently have a stomach ulcer or bleeding problems such as haemophilia.

If you experience sudden vision loss, discontinue Sildenafil and consult your doctor immediately.

Do not use Sildenafil in conjunction with other oral or local treatments for erectile dysfunction.

Special considerations for children and adolescents:

Sildenafil should not be administered to individuals below 18 years of age.

Special considerations for patients with kidney or liver problems:

Inform your doctor about kidney or liver problems, as they may prescribe a lower dose.

Taking other medicines:

Inform your doctor or pharmacist about other medicines you are taking or recently took, including those obtained without a prescription.

Sildenafil tablets may interact with certain medicines, particularly those treating chest pain. In emergencies, notify healthcare professionals treating you about VIAGRA usage. Do not combine Sildenafil with other medicines unless approved by your doctor.

Do not take Sildenafil with nitrates, as this combination may lead to a potentially dangerous decrease in blood pressure. Inform your doctor or pharmacist if you are using medications frequently prescribed for angina pectoris (“chest pain”).

Avoid using Sildenafil alongside nitric oxide donors like amyl nitrite (“poppers”), as this combination may also result in a potentially dangerous drop in blood pressure.

If you take protease inhibitors for HIV treatment, your doctor may initiate Sildenafil at the lowest dose (25 mg).

Patients using alpha-blocker therapy for high blood pressure or prostate enlargement may experience dizziness or light-headedness. Combining Sildenafil with alpha-blockers may lead to such symptoms, most likely within four hours post-Sildenafil intake. To minimize risks, maintain a regular daily dose of your alpha-blocker before starting Sildenafil. Your doctor may initiate Sildenafil at a lower dose (25 mg).

Sildenafil with food and drink:

Sildenafil can be taken with or without food, but its onset may be delayed when taken with a heavy meal.

Drinking excessive alcohol can temporarily impair erection ability. To maximize Sildenafil benefits, avoid excessive alcohol consumption before taking the medication.

Pregnancy and Breastfeeding:

Sildenafil is not intended for use by women.

Driving and using machines:

Sildenafil may induce dizziness and affect vision. Assess your response to Sildenafil before driving or operating machinery.

Important information about Sildenafil ingredients:

If your doctor has informed you of an intolerance to certain sugars, like lactose, consult your doctor before taking Sildenafil.

How is it used?

Adhere to your doctor’s instructions when taking Sildenafil. Confirm any uncertainties with your doctor or pharmacist. The standard initial dose is 50 mg, and Sildenafil should not be taken more than once a day. Ingest Sildenafil about an hour before planned sexual activity, swallowing the tablet whole with a glass of water.

If you find Sildenafil’s effect too strong or weak, consult your doctor or pharmacist.

Sildenafil facilitates erection solely when sexually stimulated. The time Sildenafil takes to work varies but usually falls between half an hour and an hour. If Sildenafil does not aid in achieving an erection or its duration is insufficient for sexual intercourse, inform your doctor.

If you take more Sildenafil than prescribed, contact your doctor. Doses exceeding 100 mg do not enhance efficacy. Do not exceed your doctor’s recommended dosage.

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