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It is not clear whether sildenafil is the actual cause of vision loss. It is not known whether this medicine will harm an unborn baby.

However, having pulmonary arterial hypertension (PAH) during pregnancy may cause complications such as heart failure, stroke, or medical problems in both mother and baby.

The benefit of treating PAH with Revatio may outweigh any risks to the baby. It may not be safe to breast-feed while using this medicine. Do not give this medication to anyone under 18 years old without medical advice. Follow all directions on your prescription label and read all medication guides or instruction sheets. Revatio is usually taken three times each day, about 4 to 6 hours apart. 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. Shake the oral suspension (liquid) before you measure a dose.

Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon). Viagra can help you have an erection when sexual stimulation occurs. 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.

Store at room temperature away from moisture and heat. Since Viagra is used as needed, you are not likely to miss a dose. If you miss a dose of Revatio , take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Drinking alcohol with this medicine can cause side effects. Grapefruit may interact with sildenafil and lead to unwanted side effects. Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor. What are the possible side effects of oral sildenafil? Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop taking sildenafil and get emergency medical help if you have: heart attack symptoms --chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating; vision changes or sudden vision loss; or erection is painful or lasts longer than 4 hours (prolonged erection can damage the penis). Call your doctor at once if you have: severe shortness of breath, cough with foamy mucus; ringing in your ears, or sudden hearing loss; irregular heartbeat; swelling in your hands, ankles, or feet; a seizure; or (convulsions); or a light-headed feeling, like you might pass out. Common side effects may include: flushing (warmth, redness, or tingly feeling); headache, dizziness; abnormal vision (blurred vision, changes in color vision) runny or stuffy nose, nosebleeds; sleep problems (insomnia); muscle pain, back pain; or upset stomach. 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 sildenafil viagra tablet for female price with similar medications such as avanafil (Stendra), tadalafil (Cialis) or vardenafil (Levitra). Tell your doctor about all other medications you use for erectile dysfunction. Tell your doctor about all your other medicines, especially: drugs to treat high blood pressure or a prostate disorder; antifungal medicine --ketoconazole or itraconazole; or medicine to treat HIV/AIDS --ritonavir and others. Other drugs may affect sildenafil, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are viagra tablet online order listed here. Your pharmacist can provide more information about sildenafil.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect.

Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in viagra 25 mg tablet buy online the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides.

The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects.

If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist. Sildenafil Citrate (Viagra) Enhances Vasodilatation in Fetal Growth Restriction. Baker, Sildenafil Citrate (Viagra) Enhances Vasodilatation in Fetal Growth Restriction, The Journal of Clinical Endocrinology & Metabolism , Volume 90, Issue 5, 1 May 2005, Pages 2550–2555, https://doi.org/10.1210/jc.2004-1831. Background: Fetal growth restriction (FGR) affects up to 8% of all pregnancies and has massive short-term (increased fetal morbidity and mortality) and long-term (increased incidence of cardiovascular disease in adulthood) health implications.

Doppler waveform analysis of pregnancies complicated by FGR suggests compromised uteroplacental circulation and placental hypoperfusion. Our aim was to determine whether myometrial small artery function was aberrant in FGR and to assess whether sildenafil citrate could improve vasodilatation in FGR pregnancies. Methods: Small arteries dissected from myometrial biopsies obtained at cesarean section from normal pregnant women (n = 27) or women whose pregnancies were complicated by FGR (n = 12) were mounted on wire myographs. Vessels were constricted (with arginine vasopressin or U46619) and relaxed (with bradykinin) before and after incubation with a phosphodiesterase-5 inhibitor, sildenafil citrate.

Results: We demonstrated increased myometrial small artery vasoconstriction and decreased endothelium-dependent vasodilatation in vessels from women whose pregnancies were complicated by FGR.

Sildenafil citrate significantly reduced vasoconstriction and significantly improved relaxation of FGR small arteries.

Conclusions: We conclude that sildenafil citrate improves endothelial function of myometrial vessels from women whose pregnancies are complicated by intrauterine growth restriction. Sildenafil citrate may offer a potential therapeutic strategy to improve uteroplacental blood flow in FGR pregnancies.

FETAL GROWTH RESTRICTION (FGR), when the fetus fails to attain its growth potential, affects approximately 8% of all pregnancies contributing to infant prematurity ( 1). FGR is responsible for considerable perinatal mortality and morbidity; infants are at increased risk of perinatal complications such as fetal distress, asphyxia, neonatal encephalopathy, hypothermia, hypoglycemia, and poor feeding as well as risks of long-term neurological and developmental disorders ( 2, 3).

These direct effects of FGR have massive implications for the delivery of health care ( 4).

Infants of FGR pregnancies may show modification of metabolic/hematological pathways and altered immune function ( 5). In the long term, deficient growth in utero is related to an increased incidence of hypertension, diabetes mellitus, and coronary heart disease in adulthood ( 6– 8).

The underlying pathology of FGR is multifactorial and poorly understood. For example, growth restriction has been shown to have a genetic component such as trisomies and cases of placental mosaicism ( 9) or be a result of physiological factors such as maternal undernutrition ( 10, 11) or smoking during pregnancy ( 12). However, the reduced growth of the FGR fetus is typically associated with placental insufficiency, i.e .

abnormalities in placental growth, development, and function.

In normal pregnancy (NP), generic viagra mail order uterine blood flow increases dramatically from approximately 50 ml/min (8.3 ? 10 ?4 liter/sec) at 10 wk gestation to over 1200 ml/min (0.02l liter/sec) at term ( 13); this massive increase in flow is facilitated by a radical trophoblast-driven modification of the

uterine