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    更新日: 2024.10.03
    Medical information: Sildenafil

    Important safety information including dosage, side effects, and precautions of Sildenafil.

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    Dosage & Administration

    - Take about 30 minutes before sexual activity. (about 1 hour before on an empty stomach is recommended)


    - Limit the dosage to once a day, and ensure that there is a gap of at least 24 hours between each dose.


    - You may not get the maximum effect if you have consumed alcohol. If you take it after eating, it may take 2-3 hours for the effect to appear.


    - Takes effect about 30 minutes after ingestion and lasts for about 4 hours.

    Side Effects

    While side effects typically improve on their own, if you notice any unusual symptoms, it's important to take appropriate action, such as stopping the medication.


    The following side effects may occur.

    - Flushing, palpitations, blood pressure abnormalities, dizziness, headache, nasal congestion, rash, etc.


    *Please exercise caution when driving or operating machinery after taking this medication.

    Precautions

    - Refrain from consuming citrus fruits like grapefruit while taking this medication.


    - If you are taking other medicines, please consult your doctor. When visiting other medical institutions, please disclose that you are taking it.


    - In case of emergency, such as the occurrence of severe side effects, please visit your nearest medical institution and discontinue use.

    Approval status in Japan

    Sildenafil is approved in Japan.


    *Medicines prescribed in this department are not covered by the Adverse Reactions Relief System.


    Availability of approved medicines that have the same active ingredients in Japan

    In Japan, Viagra has the same active ingredient as sildenafil and is approved for the treatment of erectile dysfunction.


    Means of acquisition

    Our affiliated clinic physicians purchase Sildenafil through a domestic pharmaceutical distributor.



    Information on safety and approval in other countries

    Sildenafil is approved by the U.S. Food and Drug Administration (FDA) for the treatment of erectile dysfunction.