What you need to know before you take VIAGRA
If you are allergic to sildenafil or any of the other ingredients of this medicine (listed in section 6).
If you are taking medicines called nitrates, as the combination can lead to a dangerous drop in your blood pressure. Check with your doctor if you are taking any of these medications, which are often given to relieve angina pain (or “chest pain”). If you are not sure, ask your doctor or pharmacist.
If you are using any of the medicines called nitric oxide donors such as amyl nitrite (“poppers”), as the combination can lead to a dangerous drop in your blood pressure. So its preferable to 비아그라
If you are taking riociguat. This medicine is used to treat pulmonary arterial hypertension (ie high blood pressure in the lungs) and chronic thromboembolic pulmonary hypertension (ie high blood pressure caused by blood clots). PDE5 inhibitors, such as Viagra, have been shown to increase the hypotensive effect of this drug. If you are taking riociguat or are not sure, consult your doctor.
If you have a severe heart or liver problem.
If you have recently had a stroke or heart attack, or if you have low blood pressure.
If you have a rare inherited eye disease (such as retinitis pigmentosa).
If you have previously experienced vision loss due to non-arteritic anterior ischemic optic neuropathy (NA-NOA).
Warnings and cautions
Talk to your doctor, pharmacist or nurse before taking VIAGRA:
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