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Viagra information

What is Viagra and How does it Work?

Viagra is a brand name for the generic drug Sildenafil. It was first approved by the FDA in 1998, making it the first approved drug for treating sexual dysfunction in males. Additionally, Viagra can be used for treating pulmonary hypertension and altitude sickness. The way that Viagra works is by inhibiting a certain naturally-occurring chemical in the body called phosphodiesterase type 5. This chemical is responsible for breaking down a nucleotide called cyclic GMP. During erection, cyclic GMP makes penile blood vessels broaden, thus causing erection. Because Viagra inhibits the actions of cyclic GMP, blood circulation to the penis during is prolonged and erections can be maintained longer.

How to take Viagra

Always take Viagra exactly as it was prescribed to you by a doctor. For sexual dysfunction, Viagra is typically taken in dosage amounts of between 25 and 100 mg. Patients should never take more than one dosage of Viagra in a period of 24 hours. Viagra is taken on an as-needed basis. It should be taken approximately 30-60 minutes before sexual activities. However, Viagra can be taken up to 4 hours before engaging in sexual activities and still be effective. Unless otherwise directed, you may take Viagra without regards to meals.

Potential Adverse Effects of Viagra

While taking Viagra, you may have these adverse effects which are typically not serious: becoming flushed, headaches, nasal congestion, gastrointestinal disturbances, or backache. Inform your doctor if these effects are long lasting or get worse. Get immediate medical attention if you have any of these adverse effects while taking Viagra: sudden blindness, changes to pulse, pain in chest which may radiate outwards, abrupt changes to eyesight/hearing/mental status, loss of consciousness, inflammation to extremities, or signs of an allergic reaction (hives, rashes, inflammation to oral/facial areas, or troubles breathing). In rare cases, Viagra can cause a serious erectile problem called priapism. This condition can cause permanent damage and may require surgery. If you have an erection which is painful or lasts longer than four hours, get immediate medical attention.

Notes about taking Viagra

The chances of serious adverse effects while taking Viagra is increased during strenuous physical activity, such as can occur during sexual intercourse. If you have any of these adverse effects from Viagra during sexual activity, immediately rest and contact your doctor: dizziness, feeling nauseous, or feeling pain/numb/tingly in your chest, neck, arms, or jaw.

Viagra Contraindications

Patients with certain health conditions may not be able to safely use Viagra or may need to follow special dosing instructions. Before you take Viagra, make sure your doctor knows your full medical history, especially if you have: allergies, cardiovascular problems, recent strokes, hypertension, hypotension, impaired kidneys, liver disease, disorders related to blood cells, disorder related to bleeding, ulcers, penile deformity, or a condition which prevents you from safely engaging in sexual activities. Do not take Viagra if you are pregnant or breastfeeding without first consulting your doctor.

Interactions with Viagra

If you take certain drugs, medicines or herbal treatments with Viagra, a serious interaction could occur. Be sure your doctor knows of all such products you may use before you begin treatment with Viagra. The following are just some of the possible interactions with Viagra: other medicines for erectile dysfunction, nitrates, medicine for heart problems, prescription antacids, conivaptan, the NSAID diclofenac, cancer treatments, antituberculosis medications, antibiotics, psychiatric drugs, medicine for fungal infections, medicine for blood pressure, or antiviral drugs for HIV/AIDS.

Overdose of Viagra

Never take more than one dosage of Viagra in a period of 24 hours. Taking too much Viagra could result in a serious overdose. Signs of an overdose on Viagra may include: chest pains, erratic pulse, loss of consciousness, or lightheadedness. If you suspect an overdose has occurred, even if there are no symptoms, immediately seek emergency medical treatment or contact your area's poison control helpline. US residents may call the National Poison Control Center anytime at 1-800-222-1222.

What Does Viagra Look Like?

Viagra comes in tablet form. The tablets are blue colored and in a rhomboidal shape. On one side of the tablets, the word Pfizer is stamped. On the other side is stamped VGR and the number of the dosage strength, such as "100". Viagra is also available in many generic forms so your medicine may look different.

How is Generic Viagra Different from the Brand-Name Drug?

Viagra is simply a brand name for the active drug Sildenafil. Since the patent on Viagra held by the pharmaceutical company Pfizer expired, generic Sildenafil has become available worldwide. In terms of active ingredient and effectiveness, there is no difference between brand-name Viagra and generic Viagra. However, they may have different inactive ingredients, come in different strengths, and have different dosing instructions. Always talk to your doctor or pharmacist about how to take Viagra every time you purchase this drug.

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