Contraindications for Sildenafil

Viagra precautions

Before taking Viagra, tell your doctor or pharmacist if you are allergic to it or if you have any other allergies. This product may contain inactive ingredients, which may cause allergic reactions or other problems. Consult your pharmacist for more details.

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Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems, the last 6 kidney disease, liver disease, high or low blood pressure, severe loss of body water (dehydration), penile disorders, history of painful / prolonged erection (priapism), conditions that may increase the risk of priapism, eye problems.

This medicine may cause dizziness or vision problems. Do not drive, operate machinery, or do activities that require alertness or clear vision until you are sure that you can safely do these activities. Limit alcoholic beverages.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, over-the-counter medications, and herbal products).

This brand of drug is generally not used in women. During pregnancy, Sildenafil should be used only when clearly needed. Discuss risks and benefits with your doctor.

It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.

Drug interactions

Drug interactions can change the way your medications work or increase the risk of serious side effects. This document does not contain all possible drug interactions.

A drug that may interact with this medicine is riociguat.

Viagra can cause a serious drop in your blood pressure when used with nitrates. Severe drop in blood pressure can cause dizziness, fainting, and, in rare cases, heart attacks or strokes. Do not use Viagra with any of the following: certain medicines used to treat chest pain / angina (nitrates such as nitroglycerin, isosorbide), recreational drugs called poppers containing amyl nitrate, amyl nitrite, or butyl nitrite.

If you are also taking an alpha blocker medication (such as doxazosin, tamsulosin) to treat a prostate / hypertensive hyperplasia or hypertension, your blood pressure may become too low which may cause dizziness or fainting. Your doctor may start treatment with a lower dose of Viagra to minimize the risk of low blood pressure.

Other medications can affect the elimination of Sildenafil from your body, which can affect the functioning of sildenafil. HIV protease inhibitors (such as ritonavir, saquinavir), hepatitis C virus protease inhibitors (such as boceprevir, telaprevir), mifepristone, rifampin, HIV protease inhibitors Clarithromycin, erythromycin), among others.

Do not take this medicine with any other products containing sildenafil or other similar medicines for erectile dysfunction (ED) or pulmonary hypertension (such as tadalafil, vardenafil).

Viagra dosage

To treat ED erectile dysfunction, take this medication by mouth as directed by your doctor, usually as needed. Take Viagra for at least 30 minutes, but not more than 4 hours before sexual activity (1 hour before is most effective). Do not take more than once a day.

A meal rich in fat can delay the rapidity with which the medication begins to work.

The dose is based on your medical condition, response to treatment and other medications you are taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).


Rory Rory avatar

Viagra is always with me. Since I have two girlfriends, who always want my attention, I have to use these tablets for the third or fourth time. In general, after two natural acts, while the girls are resting, to continue I take a pill and drinking half a glass of water. The instruction says that the drug is strictly forbidden to take with alcohol and sometimes I break this rule, but I’m still alive. We’ll see how much longer I’ll hold out) Viagra dilates the blood vessels in the whole body and then it flows the blood to the penis, as a result is an excellent erection. The action of the tablet comes in half an hour. The disadvantages can only be attributed to the fact that the skin rubs off because of many hours of sex. Once after 2 days in bed, there were headaches, but maybe everyone should have some limits in their desires.

Fabio Fabio avatar

To begin with, I never felt the need for this drug. I’m 26, a healthy man, with an erection and normal duration of sexual intercourse, always and everything was in order …
But I wanted to try for a long time. True, that my mind though objected, but not so much.
Curiosity took the same up – and now I’m standing in the pharmacy and ask to sell me Viagra. You should have seen the eyes of a girl – a saleswoman (my peer) at that moment … “Poor thing … Such a young woman” – was clearly read on her face. With some inner pity, she handed me a box with one single tablet and the price …
But there is nothing to do – I take it and jump out of the pharmacy.
At home one more trouble awaited – my wife could not understand why I needed it. Type – “I’m not exciting you already?”. Despite all my arguments that this is a purely scientific experiment, I was offended. Since I tried not to try without it, I had to postpone it for another two days until the storm stopped.
And then came the day of the experiment. After work, I did not really have dinner, the drug took almost on an empty stomach. After an hour of waiting (all according to instructions) went to your beloved …
Well, I can not tell you that I felt some improvement in my erection. Apparently the tablet is designed for those who have a real problem … Or whom the partner does not excite so much 😉
As for the duration of the act, no changes were identified either.
What really intensified is a desire. Just like some starving male from the wild jungle ….
Of the side effects during an hour of waiting I can distinguish reddening face and slight noise in the ears.
Try it or not – it’s up to you.
Thank you. I hope that was useful for you.