viagra who should not take?
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Do not take sildenafil if you: have had an allergic reaction to sildenafil (Viagra) or any other medicines in the past. are taking medicines called nitrates for chest pain. have a serious heart or liver problem. have recently had a stroke or a heart attack.
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However, Viagra and other ED medications don't always work 100 percent effectively. In fact, some men who take Viagra still experience erectile dysfunction and other sexual performance issues even after using the medication. Most of the time, these problems are fixable.
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Sildenafil for erectile dysfunction (Viagra) can be taken by men aged 18 and over. It's not for women or children. Sildenafil for pulmonary hypertension (Revatio) can be taken by adults and children aged 1 and over. Sildenafil is not suitable for some people.
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Eating a large meal, especially a meal that's high in fat, can delay the absorption of Viagra and make it less effective. If Viagra doesn't seem to work for you, try taking it two to three hours after your last meal. Wait for Viagra to kick in. Viagra works quickly, but its effects aren't instant.
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Tell your doctor if you are taking, have recently taken or might take any other medicines. Do not use GTN Spray if you are taking: Riociguat, used to treat pulmonary hypertension. Sildenafil, tildenafil, vardenafil or other similar phospho-diesterase inhibitors used to treat male erectile dysfunction (impotence).
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Yes, the FDA requires a prescription for Viagra, both for the brand-name medication and generic sildenafil. That's because all erectile dysfunction medications, including Viagra, comes with the risk of side effects, potentially dangerous contraindications, and drug interactions.
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Oral medications Alternative, prescription-only PDE5 inhibitors to Viagra include: Vardenafil: Sold under the brand names Levitra and Staxyn, this drug is available in tablet and disintegrating tablet form. To be effective, take vardenafil one hour before sex. It can be effective for up to 7 hours.
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Because 100mg is the highest dose available, you should never 'double up' on tablets or take more than one in 24 hours. Sildenafil 100mg is the highest safe dosage you can take – if it is ineffective, you should try another ED treatment.
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Viagra has been shown to be safe in stable cardiovascular diseases including heart failure, hypertension, and coronary artery disease. Although many have looked, there has been no clear evidence that Viagra is associated with increased rate of heart attacks or cardiovascular events.
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Ideally you should take Viagra on an empty stomach. This doesn't mean starving yourself. Just leave two hours after eating before taking Viagra.
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To treat erectile dysfunction-ED, take this drug by mouth as directed by your doctor, usually as needed. Take sildenafil at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). Do not take more than once daily.
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['sildenafil (Viagra)', 'tadalafil (Cialis)', 'vardenafil (Levitra, Staxyn)', 'avanafil (Stendra)', 'alprostadil (Caverject, Edex, MUSE)']
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Viagra helps stimulate erections by increasing levels of cGMP -- which is also involved in blood clotting. Therefore, by increasing levels of cGMP, Viagra may actually increase the risk of blood clots, according to the researchers. To check this theory, the researchers tested the effect of Viagra on platelets.
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['Avanafil (Stendra)', 'Sildenafil (Viagra)', 'Tadalafil (Cialis)', 'Vardenafil (Levitra, Staxyn)']
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The Root of Your ED is Psychological Performance anxiety and stress may be responsible for the lack of effect that Viagra has in many men. It is equally important to be comfortable mentally as well as physically during sexual activities for Sildenafil-based medications to work.
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Your doctor will start you on the VIAGRA dose he thinks is right for you. For most men, the recommended dose is 50 mg. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. The maximum recommended dosing frequency is once per day.
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The short answer is: Viagra (sildenafil) is a prescription medication, meaning it isn't available over the counter from your local pharmacy. If you have erectile dysfunction (ED) symptoms, getting a prescription for Viagra isn't as difficult—or as jarring—as you might think.