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    Information about Sildenafil

    Sildenafil uses

    Sildenafil is used in the treatment of erectile dysfunction.

    How sildenafil works

    Sildenafil is a phosphodiesterase-5 (PDE-5) inhibitor. It works by relaxing the blood vessels in your penis, thereby increasing blood flow into the penis on sexual stimulation. This helps you achieve and maintain a hard, erect penis suitable for sexual activity.

    Common side effects of sildenafil

    Flushing (sense of warmth in the face, ears, neck and trunk), Headache, Stiffness, Nosebleeds, Blurred vision, Indigestion, Muscle pain
    Content Details
    Written By
    Dr. Balshine Singh Kanwar
    MD (General Medicine), MBBS
    Reviewed By
    Dr. Lalit Kanodia
    MD (Pharmacology), MBBS
    Last updated on:
    23 Aug 2019 | 03:15 PM (IST)
    Want to know more?
    Read Our Editorial Policy

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    Frequently asked questions for Sildenafil


    Q. Can I get Sildenafil without a prescription?

    No, you should never get Sildenafil without prescription. Sildenafil is a medicine, and it should be only taken when prescribed by a doctor.

    Q. Can I take Sildenafil for premature ejaculation?

    Sildenafil is not known to have any beneficial effects of treating premature ejaculation. It is used for the treatment of erectile dysfunction.

    Q. Can I take Sildenafil for the rest of my life?

    Sildenafil is a prescription drug and should only be taken for the duration that is advised by your doctor.

    Q. Can I take Sildenafil in my twenties?

    Yes, if prescribed by your doctor then Sildenafil can be taken in your twenties.

    Q. Does Sildenafil affect fertility?

    No, Sildenafil does not affect fertility, neither negatively nor positively.

    Q. Does Sildenafil affect sperm?

    Sildenafil does not affect sperm count or its health. It is a medicine that is used to treat erectile dysfunction.

    Q. Does Sildenafil increase blood pressure?

    No, Sildenafil is not associated with an increase in blood pressure. It can cause a decrease in blood pressure especially if taken with other blood-pressure-lowering medications. Please consult your doctor before taking Sildenafil with any other medicine.

    Q. Why does Sildenafil cause a fall in blood pressure (hypotension)?

    Sildenafil has the property of relaxing the smooth muscle of the blood vessels and widening them which can cause a fall in blood pressure (hypotension). So, when used with blood pressure lowering drugs or nitrates, it can cause a severe fall in blood pressure, which could be fatal. Sildenafil should not be taken if you are taking nitrates for chest pain or you have a history of heart attack or stroke in the past six months.

    Q. Is Sildenafil safe to use in patients with diabetes?

    Yes, if prescribed by your doctor then Sildenafil is safe to use in patients with diabetes.

    Q. Why is the use of Sildenafil contraindicated with nitrates?

    Use of Sildenafil is harmful for patients taking nitrates (organic nitrates or organic nitrites) as their combined use can cause a severe fall in blood pressure, which can also result in death. It is advisable to keep a time gap of 24 hours between the intake of Sildenafil and any nitrate substance.

    Q. Can I take Sildenafil with paracetamol?

    Yes, Sildenafil can be taken with paracetamol. No drug-drug interactions or any harmful effects have been reported when they are used together.

    Content on this page was last updated on 23 August, 2019, by Dr. Varun Gupta (MD Pharmacology)