Important Safety Warnings and Contraindications

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity.

You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day. Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill.

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This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss. Viagra is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant. It is not known whether sildenafil passes into breast milk or if it could harm a nursing baby. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away.

You could be having a serious side effect of sildenafil.

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Generic name: sildenafil (oral) [ sil-DEN-a-fil ] Other brand names of sildenafil (oral) include: Revatio, Viagra, Vybrique Drug class: Impotence medications Viagra relaxes muscles found in the walls of blood vessels and increases blood sildenafil viagra price flow to particular areas of the body. Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. This page contains specific information for Viagra, not Revatio. Do not take Viagra while also taking Revatio, unless your doctor tells you to. Store at room temperature weekend viagra away from moisture and heat.

• The efficacy of Viagra 100mg can vary based on age and health.
• Do not take Viagra 100mg if you have a history of heart problems without medical advice.
• Possible allergic reactions include rash, swelling, or difficulty breathing.
• Viagra 100mg can interact with certain antibiotics and antifungals.
• Do not operate machinery or drive immediately after taking Viagra 100mg.
• Patients should report any persistent pain or abnormal erection to a doctor.
• Viagra 100mg can sometimes cause a drop in blood pressure.
• Pregnant or nursing women should avoid using Viagra 100mg unless advised.

Since Viagra is used as needed, you are not likely to miss a dose.

• Viagra 100mg works by increasing blood flow to the penis.
• It belongs to a class of drugs called phosphodiesterase inhibitors.
• The effect of Viagra 100mg can last for up to 4-6 hours.
• Take Viagra 100mg on an empty stomach for faster results.
• It is available by prescription only in most countries.
• Do not take more than one dose in a 24-hour period.
• Viagra 100mg may cause vision changes or dizziness in some users.
• Keep Viagra 100mg out of reach of children and store it properly.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. Drinking alcohol with this medicine can cause side effects.

• Viagra 100mg is a popular medication for treating erectile dysfunction.
• It contains sildenafil citrate as its active ingredient.
• Viagra 100mg should be taken approximately 30-60 minutes before sex.
• The maximum recommended dose is once per 24 hours.
• Common side effects include headaches, flushing, and nasal congestion.
• Do not use Viagra 100mg with nitrates or certain heart medications.
• Alcohol can increase side effects and reduce drug effectiveness.
• Always consult a doctor before using Viagra 100mg, especially if you have health issues.

Grapefruit and grapefruit juice may interact with sildenafil and lead to unwanted side effects.

Avoid the use of grapefruit products while taking sildenafil.

What is Viagra?

This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). To make sure Viagra is safe for you, tell your doctor if you have ever had: heart disease or heart rhythm problems, coronary artery disease; heart disease or heart rhythm problems, coronary artery disease; a heart attack, stroke, or congestive heart failure; a heart attack, stroke, or congestive heart failure; a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia; a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia; retinitis pigmentosa (an inherited condition of the eye); retinitis pigmentosa (an inherited condition of the eye); a physical deformity of the penis (such as Peyronie's disease); or a physical deformity of the penis (such as Peyronie's disease); or if you have been told you should not have sexual intercourse for health reasons. if you have been told you should not have sexual intercourse for health reasons. Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor. Get emergency medical help if you have signs of an allergic reaction to Viagra: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

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If you are not certain, ask your healthcare professional. You are taking medicines called Alpha-1 Blockers (such as Tamsulosin, Terazosin, Prazosin, Alfuzosin), as the combination may further lower your blood pressure. In order to reduce the chances of these symptoms occurring, you should be on a regular daily dose of your Alpha-blocker before you start drugs for erectile dysfunction. You recently had a stroke or a heart attack, low blood pressure or uncontrolled high blood pressure You have severe heart, liver or kidney problem You have certain rare inherited eye diseases (such as retinitis pigmentosa) You have a stomach ulcer or bleeding problem You have sickle cell anaemia (an abnormality of red blood cells) You have a deformity of your penis Avoid taking grapefruit, or grapefruit juice as they may interact with your medication and increase the risk of side-effects. Drinking alcohol can temporarily weaken your ability to get an erection and may increase the blood pressure lowering effects of the medication, which can be dangerous.

Serious Side Effects and Risks

To get the maximum benefit from your medication, it is advisable not to drink excessive amounts of alcohol before taking this medication. Inform your healthcare professional if you are taking or intend to take any other medication, supplements, traditional medications or herbal remedies. Medications used to treat human immunodeficiency virus (HIV) infection Store in a cool and dry place, away from direct sunlight. Pack this medication into a black trash bag and seal it tightly before throwing into the rubbish chute or bin. If you take more than the recommended dose, please seek medical advice immediately. Stop taking Viagra and get emergency medical help if you have: heart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating; heart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating; vision changes or sudden vision loss; or vision changes or sudden vision loss; or erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

What other drugs will affect Viagra?

Tell your doctor if you are breast-feeding a baby. Do not give this medicine to anyone under 18 years old without medical advice. Take Viagra exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended. erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis).

Call your doctor at once if you have: ringing in your ears, or sudden hearing loss; ringing in your ears, or sudden hearing loss; swelling in your hands, ankles, or feet; swelling in your hands, ankles, or feet; a light-headed feeling, like you might pass out.

What happens if I miss a dose?

Some medicines can cause unwanted or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially riociguat (Adempas) and nitrates. Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Taking sildenafil with a nitrate medicine can cause a viagra black sudden and serious decrease in blood pressure. Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours.

Viagra 100mg and Heart Health

A prolonged erection (priapism) can damage the penis. Stop using Viagra and get emergency medical help if you have sudden vision loss. You should not use Viagra if you are allergic to sildenafil, or: if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas). if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas). Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. a light-headed feeling, like you might pass out. abnormal vision (blurred vision, changes in color vision) abnormal vision (blurred vision, changes in color vision) This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. Do not take Viagra with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra).

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The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information. The American Society of Health-System Pharmacists. ↑ Boolell, M; Allen, MJ; Ballard, SA; Gepi-Attee, S; Muirhead, GJ; Naylor, AM; Osterloh, IH; Gingell, C (tháng 6 năm 1996). "Sildenafil: an Orally Active Type 5 Cyclic GMP-Specific Phosphodiesterase Inhibitor for the Treatment of Penile Erectile Dysfunction".

How to Take for Best Results

↑ "The Viagra jackpot: A history of the little blue pill at 20". Viagra (drug) tại Encyclopædia Britannica (bằng tiếng Anh) Pfizer Pharmaceutical (Company website) - manufacturer of Viagra; prescribing information available in PDF format. FDA Web Site for Viagra Consumer Information FDA current Viagra label (a form of clinical information and report) MedlinePLUS drug Information - Side Effects of sildenafil Lưu trữ ngày 28 tháng 9 năm 2007 tại Wayback Machine COGR also signed on to a broader research community letter led by ACE raising similar concerns. COGR provides this compilation of resources, many developed by COGR, explaining Facilities and Administrative (F&A/Indirect) costs, the importance of these… COGR brings together the nation’s top research institutions to advocate for sound policies, streamline compliance, and strengthen the U.S. research enterprise.