Storage and Handling of Sildenafil Tablets

If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about VIAGRA that is written for health professionals. For more information, go to or call 1-888-4VIAGRA Inactive ingredients: microcrystalline cellulose, anhydrous dibasic calcium phosphate, croscarmellose sodium, magnesium stearate, hypromellose, titanium dioxide, lactose, triacetin, and FD & C Blue #2 aluminum lake This Patient Information has been approved by the U.S. Food and Drug Administration. This product's label sildenafil 100 mg tab may have been updated. For current full prescribing information, please visit Viagra (sildenafil citrate), Revatio (sildenafil), Cardura (doxazosin mesylate), and Minipress (prazosin HCl) are registered trademarks of Pfizer Inc. The other brands listed are trademarks of their respective owners and are not trademarks of Pfizer Inc.

In case of emergency/overdose

Before you take VIAGRA, tell your healthcare provider if you: have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve or heart failure have had heart surgery within the last 6 months have low blood pressure, or high blood pressure that is not controlled have had an erection that lasted for more than 4 hours have problems with your blood cells such as sickle cell anemia, multiple myeloma, or leukemia have retinitis pigmentosa, a rare genetic (runs in families) eye disease have ever had severe vision loss, including an eye problem called non-arteritic anterior ischemic optic neuropathy (NAION) have kidney problems or are having kidney dialysis Tell your healthcare provider about all the medicines you take1, including prescription and over-the-counter medicines, vitamins, and herbal supplements. VIAGRA may affect the way other medicines work, and other medicines may affect the way VIAGRA works causing side effects. Especially tell your healthcare provider if you take any of the following: medicines called nitrates (see "What is the most important information I should know about VIAGRA?") medicines called guanylate cyclase stimulators, such as riociguat (Adempas) medicines called alpha blockers such as Hytrin (terazosin HCl), Flomax (tamsulosin HCl), Cardura (doxazosin mesylate), Minipress (prazosin HCl), Uroxatral (alfuzosin HCl), Jalyn (dutasteride and tamsulosin HCl), or Rapaflo (silodosin). Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting.

When to call your doctor

medicines called HIV protease inhibitors, such as ritonavir (Norvir), indinavir sulfate (Crixivan), saquinavir (Fortovase or Invirase) or atazanavir sulfate (Reyataz) some types of oral antifungal medicines, such as ketoconazole (Nizoral), and itraconazole (Sporanox) some types of antibiotics, such as clarithromycin (Biaxin), telithromycin (Ketek), or erythromycin other medicines that treat high blood pressure VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. REVATIO is used to treat a rare disease called pulmonary arterial hypertension (PAH). VIAGRA should not be used with REVATIO or with other PAH treatments containing sildenafil or any other PDE5 inhibitors (such as Adcirca [tadalafil]). Ask your healthcare provider or pharmacist for a list of these medicines, if you are not sure. Take VIAGRA exactly as your healthcare provider sildenafil citrate tablets for female tells you to take it.

Mild side effects

Your healthcare provider will tell you how much VIAGRA to take and when to take it. Take VIAGRA about 1 hour before sexual activity. You may take VIAGRA between 30 minutes to 4 hours before sexual activity if needed. VIAGRA can be taken with or without food. If you take VIAGRA after a high fat meal (such as a cheeseburger and french fries), VIAGRA may take a little longer to start working Do not take VIAGRA more than 1 time a day. The makers of these brands are not affiliated with and do not endorse Pfizer Inc or its products.

The abbreviations used are s for singlet, d for doublet, t for triplet and q for quartet. The chemical shifts are given in ppm (parts per million) and are followed by the number of Hydrogens the peaks account for: Sildenafil, sold as Viagra and other trade names, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [1] Its effectiveness for treating sexual dysfunction in women has not been demonstrated.

Common side effects include headaches and heart burn, as well as flushed skin.

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General information about the safe and effective use of VIAGRA. Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use VIAGRA for a condition for which it was not prescribed. Do not give VIAGRA to other people, even if they have the same symptoms that you have. This Patient Information leaflet summarizes the most important information about VIAGRA. Caution is advised in those who have cardiovascular disease. Rare but serious side effects include prolonged erections, which can lead to damage to the penis, and sudden-onset hearing loss. Sildenafil should not be taken by people who take nitrates such as nitroglycerin, as this may result in a severe and potentially fatal drop in blood pressure. It acts by inhibiting cGMP-specific phosphodiesterase type 5 (PDE5), an enzyme that promotes degradation of cGMP, which regulates blood flow in the penis.

It was originally discovered by Pfizer scientists Andrew Bell, David Brown, and Nicholas Terrett.

• Sildenafil 50mg is often preferred for first-time users to gauge effectiveness.
• It is important to follow the prescribed dosage for safety and efficacy.
• Overuse of sildenafil can lead to serious health risks and complications.
• The medication should be taken in the prescribed dose and not altered without medical advice.
• Some foods and medications can affect how sildenafil works in the body.
• Erectile dysfunction can have underlying health causes that require medical attention.
• Sildenafil does not cure erectile dysfunction; it only helps manage symptoms.
• Using sildenafil without a proper diagnosis can mask underlying health issues.
• It is essential to report any adverse reactions to a healthcare professional immediately.
• Men with heart conditions should consult a doctor before using sildenafil.
• Sildenafil 50mg is a common starting dose for many patients.

[2][3] Since becoming available in 1998, sildenafil has been a common treatment for erectile dysfunction; its primary competitors are tadalafil (Cialis) and vardenafil (Levitra).

The preparation steps for synthesis of sildenafil are:[40] Methylation of 3-propylpyrazole-5-carboxylic acid ethyl ester with hot dimethyl sulfate Hydrolysis with aqueous NaOH to free acid Carboxamide formation with refluxing thionyl chloride/NH4OH Pfizer’s patent on sildenafil citrate expired in some member countries of the EU, Austria, Denmark, France, Germany, Ireland, Italy, The Netherlands, Spain, Sweden, the United Kingdom and Switzerland on 21 June 2013.

What’s the Best Viagra for Men?

Do not take VIAGRA if you take any other medicines called "nitrates." Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke. Do not take VIAGRA if you take medicines called guanylate cyclase stimulators which include: Riociguat (Adempas®) a medicine that treats pulmonary arterial hypertension and chronic-thromboembolic pulmonary hypertension. Tell all your healthcare providers that you take VIAGRA. If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took VIAGRA.

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Ask your doctor if your heart is healthy enough to handle the extra strain of having sex. VIAGRA does not protect you or your partner from getting sexually transmitted diseases, including HIV—the virus that causes AIDS. VIAGRA is a prescription medicine used to treat erectile dysfunction (ED). You will not get an erection just by taking this medicine. VIAGRA helps a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated).

How sildenafil is used

VIAGRA is not for use in women or children. It is not known if VIAGRA is safe and effective in women or children under 18 years of age. take medicines called nitrates (such as nitroglycerin) use street drugs called "poppers" such as amyl nitrate or amyl nitrite, and butyl nitrate take any medicines called guanylate cyclase stimulators such as riociguat (Adempas) are allergic to sildenafil, as contained in VIAGRA and REVATIO, or any of the ingredients in VIAGRA. See the end of this leaflet for a complete list of ingredients in VIAGRA. What should I tell my healthcare provider before taking VIAGRA? [53][54][55] A UK patent held by Pfizer on the use of PDE5 inhibitors (see below) as treatment of impotence was invalidated in 2000 because of obviousness; this decision was upheld on appeal in 2002. In 1992, Pfizer filed a patent covering the substance sildenafil and its use to treat cardiovascular diseases.

See also:

If you accidentally take too much VIAGRA, call your doctor or go to the nearest hospital emergency room right away. What are the possible side effects of VIAGRA? an erection that will not go away (priapism). sudden vision loss in one or both eyes. It is uncertain whether PDE5 inhibitors directly cause the vision loss.

How it works

Stop taking VIAGRA and call your healthcare provider right away if you have sudden vision loss in one or both eyes. If you have these symptoms, stop taking VIAGRA and contact a doctor right away. The most common side effects of VIAGRA are: abnormal vision, such as changes in color vision (such as having a blue color tinge) and blurred vision In addition, heart attack, stroke, irregular heartbeats and death have happened rarely in men taking VIAGRA. Most, but not all, of these men had heart problems before taking VIAGRA. It is not known if VIAGRA caused these problems.

Is 20 mg of sildenafil effective for ED?

These are not all the possible side effects of VIAGRA. For more information, ask your healthcare provider or pharmacist. You may report side effects to FDA at 1-800-FDA-1088. Store VIAGRA at room temperature between 68°F to 77°F (20°C to 25°C). Keep VIAGRA and all medicines out of the reach of children. [58] This patent was published in 1993 and expired in 2012. In 1994, Pfizer filed a patent covering the use of sildenafil to treat erectile dysfunction. [59] This patent was published in 2002 and will expire in 2019. Teva sued to have the latter patent invalidated, but Pfizer prevailed in an August 2011 federal district court case. The patent on Revatio (indicated for pulmonary arterial hypertension rather than erectile dysfunction) expired in late 2012.

• Sildenafil 50mg is a medication used to treat erectile dysfunction.
• It belongs to the class of phosphodiesterase type 5 inhibitors.
• Typical starting dose is 50mg taken about an hour before activity.
• Sildenafil works by increasing blood flow to the penis.
• It can help achieve and maintain an erection suitable for sex.
• The effects of sildenafil usually last around 4 to 6 hours.
• Avoid taking sildenafil with high-fat meals as it may delay absorption.
• Common side effects include headaches, flushing, and nasal congestion.
• Patients should not exceed one dose within a 24-hour period.
• It is important to consult a doctor before using sildenafil, especially if on other medications.
• Sildenafil may cause dizziness; avoid driving until effects are known.

Generic versions of this low-dose form of sildenafil have been available in the U.S.

• Sildenafil 50mg dosage is generally effective and well-tolerated.
• It is recommended to use sildenafil at the same time each day if needed regularly.
• Never share your medication with others; it is prescribed specifically for you.
• Persistent or severe side effects should be reported to a healthcare provider.
• Electronic and physical stores require a prescription for purchasing sildenafil.
• Proper use of sildenafil can improve confidence and quality of life.
• The medication may interact with certain antihypertensive drugs.
• Lifestyle factors like smoking cessation can improve erectile function.
• Sildenafil is not a hormone therapy; it acts locally in the blood vessels.
• It should not be used with recreational drugs containing nitrates or amyl nitrates.
• Medical history

from a number of manufacturers, including Greenstone, Mylan, and Watson, since early 2013.