Oral Sildenafil Reduces Pulmonary Hypertension After Cardiac Surgery

Oral sildenafil in the treatment of erectile dysfunction Research Question: Research Question: Funding: Funding: Year Study Began: Year Study Began: Year Study Published: Year Study Published: Study Location: Study Location: Who Was Studied: Who Was Studied: Who Was Excluded: Who Was Excluded: Patients: Patients: Study Overview: Study Overview: Study Interventions: Study Interventions: Follow-up: Follow-up: Endpoints: Endpoints: Criticism and Limitations: Criticism and Limitations: Other Relevant Studies and Information: Other Relevant Studies and Information: Summary and Implications: Summary and Implications: References References Other Relevant Studies and Information: Other Relevant Studies and Information: This chapter summarizes the results of a landmark trial comparing different doses of oral sildenafil versus placebo to treat erectile dysfunction. Patients received either an identical placebo or 25- mg, 50-mg, or 100-mg tablets of sildenafil to be taken approximately one hour before planned sexual activity (but not more than once daily) for 24 weeks.

Higher doses of sildenafil resulted in higher mean score for frequency of penetration and maintenance of erection, which were also consistently better than placebo.

• Common side effects include headache, flushing, and nasal congestion.
• Serious side effects are rare but can include vision changes and priapism.
• Report any severe reactions to your doctor immediately.

The most common side effects were headaches, flushing, dyspepsia, rhinitis, and visual disturbances.

Dosing & Uses

Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking. Bring this list with you each time you visit a doctor or if you are admitted to the hospital. You should carry the list with you in case of emergencies. Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA DOI: 10.1016/S0140-6736(05)60375-3 External LinkAlso available on ScienceDirect External Link The study by I Goldstein and colleagues1 provides the much needed data for scrutiny by the medical community with regard to the efficacy, mechanism of action, pharmacokinetics, dosing, and side-effects of sildenafil. Since its approval by the Food and Drug Administration on March 27, 1998, sildenafil (marketed by Pfizer as buy sildenafil uk Viagra) has been a pharmaceutical phenomenon. This study established sildenafil as an effective, reasonably well-tolerated treatment for men with erectile dysfunction of varying etiologies.

• Sildenafil may cause dizziness; avoid driving until effects are known.
• Seek immediate medical help if an erection lasts more than 4 hours.
• Do not mix sildenafil with other ED medications unless directed.

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Liver Dose Adjustments

Keep all medication out of sight and reach of children as many containers are not child-resistant. Place the medication in a safe location – one that is up and away and out of their sight and reach. Dispose of unneeded medications in a way so that pets, children, and other people cannot take them. Do not flush this medication down the toilet. Talk to your pharmacist about take-back programs in your community.

Pregnancy Categories

Visit the FDA's Safe Disposal of Medicines website for more information. In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911. Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. Choose this option to get remote access when outside your institution. Shibboleth/Open Athens technology is used to provide single sign-on between your institution's website and Oxford Academic.

How should I take sildenafil?

numbness, burning, or tingling in the arms, hands, feet, or legs pain in muscles, back, arms, or legs changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green) sudden severe loss of vision (see below for more information) erection that is painful or lasts longer than 4 hours rash; itching; hives; difficulty breathing or swallowing; swelling of the eyes, face, throat, tongue, or lips Some patients experienced a sudden loss of some or all of their vision after they took sildenafil or other medications that are similar to sildenafil. The vision loss was permanent in some cases. It is not known if the vision loss was caused by the medication. If you experience a sudden loss of vision while you are taking sildenafil, call your doctor immediately. Do not take any more doses of sildenafil or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor.

Pulmonary Arterial Hypertension

There have been reports of heart attack, stroke, irregular heartbeat, bleeding in the brain or lungs, high blood pressure, and sudden death in men who took sildenafil for erectile dysfunction. Most, but not all, of these people had heart problems before taking sildenafil. It is sildenafil 200 mg not known whether these events were caused by sildenafil, sexual activity, heart disease, or a combination of these and other causes. Talk to your doctor about the risks of taking sildenafil. Some patients experienced a sudden decrease or loss of hearing after they took sildenafil or other medications that are similar to sildenafil. Select your institution from the list provided, which will take you to your institution's website to sign in.

Brand names

if you are taking sildenafil to treat erectile dysfunction, tell your doctor if you have ever been advised by a healthcare professional to avoid sexual activity for medical reasons or if you have ever experienced chest pain during sexual activity. Sexual activity may be a strain on your heart, especially if you have heart disease. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. tell all your healthcare providers that you are taking sildenafil. If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil.

Revatio Injection

Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. If you are taking sildenafil for erectile dysfunction, you are unlikely to miss a dose since this medication is taken as needed, not on a regular dosing schedule. If you are taking sildenafil for PAH, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one. When on the institution site, please use the credentials provided by your institution. Do not use an Oxford Academic personal account.

Side Effects

It is not known if the hearing loss was caused by the medication. If you experience a sudden loss of hearing, sometimes with ringing in the ears or dizziness, while you are taking sildenafil, call your doctor immediately. If you are taking sildenafil (Viagra) for erectile dysfunction, do not take any more doses of sildenafil (Viagra) or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor. If you are taking sildenafil (Liqrev, Revatio) for PAH, do not stop taking your medication until you talk to your doctor. Call your doctor if you have any unusual problems while you are taking this medication.

Flexible, Fast-Acting Alternative to Oral Tablets for Sexual Health and Vasodilation Therapy

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online ( or by phone (1-800-332-1088). Keep this medication in the container it came in, tightly closed, and out of reach of children. Store the tablets at room temperature and away from excess heat and moisture (not in the bathroom). Store the suspension at room temperature or in a refrigerator, but do not freeze it. Dispose of any unused suspension after 60 days. Following successful sign in, you will be returned to Oxford Academic.

References (23)

Its appeal stems from the fact that sildenafil is the first effective and safe oral therapy for men with erectile dysfunction.1–4 Pfizer's stock has risen by 50%, primarily because of aggressive marketing and the tremendous expectations for sildenafil.3 New prescriptions have increased almost exponentially—from 546 in the week ending April 3, to 269 842 in the week ending May 1.3 Urologists and nonurologists alike have been swamped with requests for the drug. The associated media frenzy has been fuelled by endorsements from prominent individuals. Such reports stoke the already intense public demand for information about and prescriptions for sildenafil. In the midst of these developments, it is crucial to recognise and deal with the potential problems. First, sildenafil is no panacea; not all patients with erectile dysfunction will benefit from it. If your institution is not listed or you cannot sign in to your institution's website, please contact your librarian or administrator.

This formulation may be used in cases where the risk-benefit profile for a specific pediatric patient is acceptable.

Second, there is substantial risk that many patients will receive little or no evaluation before treatment; the potential for ill-informed and inappropriate prescribing is high.4 Third, sildenafil is not an aphrodisiac,3,4 nor does it increase sexual desire or libido.1–4 The drug has the potential for abuse by thrill-seekers. Fourth, the known side-effects may not be transient, as current data suggest. Sildenafil may also have other, as-yet-unknown, adverse effects that will become evident only over time. In the first few weeks after sildenafil's release, physicians' only information source was the package insert.2 Goldstein's study1 supplied data that physicians should use to make informed decisions in the work-up and treatment of patients with erectile dysfunction. Physicians who prescribe sildenafil should do so only after a comprehensive work-up (history and physical examination, with diagnostic tests if indicated) has been completed.