Sildenafil:Usage, Dosage

Reviewed by Dr. Hasan Feroz MD,


Sildenafil is used to treat diseases like erectile dysfunction, impotence. It works by increasing the blood flow to the veins of the penis and helps in maintaining an erection. It is not used to treat sexually transmitted diseases like gonorrhea, syphilis, etc.  

Sildenafil comes with tablet form only and the brand names of the Sildenafil are Vigora and Manforce. It starts from 25 mg to 100 mg. The Initial dose started with the lowest strength and increase gradually.


For ED

For erectile dysfunction, your doctor may recommend you to start with the lowest dose i.e. from 25 mg and gradually it will be increased. For best results, it can be taken before the 30 minutes of bedtime. It remains in the body for 6-8 hours.

Most of the patients complained about not working the sildenafil. The reason behind it is they have taken the highest dose from starting but gradually the medicine decreases the working in the body. That is why it is recommended to take it from 25 mg per day initially. By taking a higher dose initially it will work initially but later body does not respond to the medicine.

Side effects of sildenafil

Headache, upset stomach, flushing, dizziness, and stuffy nose are the common side effects that everybody faces. Some patients may face lightheadedness also.

It is recommended not to move quickly in dizziness after taking the viagra. It is recommended to take action of the body slowly. If you face severe headache and flushing you can take paracetamol tablets to reduce the side effects of sildenafil.

Like tadalafil, sildenafil is not used to treat benign prostatic hyperplasia.

You may also face extra pressure on your heart if you are old and you may face heart problems while using the tadalafil to treat the ED. If this medicine causes problems to you you may consult your doctor as soon as possible. If you face vision loss or one eye vision loss you should have to stop the medication immediately and consult your doctor.

You may also experience hearing problems, prolonged erections that may last 4 hours, and itching/swelling in the tongue.

This is not the complete list of the possible side effects. Except for these side effects you may face other different side effects.

Some Facts about Sildenafil

Sildenafil may last in your body for upto 8 hours. So it recommended not to use the tadalafil before 8 hours of completion. It is a fast acting drug. It helps to relax the blood vessels.

By taking sildenafil you can see the changes in your blood pressure. Your blood pressure may go down when you take the pills as it dilates the blood vessels.

Viagra and sildenafil both are for erectile dysfunction but sildenafil works for 8 hours while tadalafil works for 24 hours. Viagra has more side effects and it causes headache more severe than tadalafil.

If you have kidney or liver disease you must have to consult with your doctor as the medicine is metabolized in the liver and eliminated from the kidneys.

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