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If you’ve already had NAION or have crowded optic disc, you may have a higher risk for NAION and vision changes with this drug.

Are there any safety measures I should take before using this drug? Like most medications, there are precautions you should take before using this drug. Make sure you talk with your doctor about:

Sudden vision loss warning: This drug can cause sudden vision loss in one or both eyes. This can be a sign of a serious eye problem. If this occurs, stop taking sildenafil and call your doctor right away.

What if I forget to take it? If you are taking Revatio and you forget to take your scheduled dose, take it as soon as possible. However, you should never double your dosage. If you completely miss a dose and it’s time for the next dose, skip the one you missed.

There are other drugs available to treat your condition. Some may be better suited for you than others. Talk with your doctor about other drug options that may work for you.

Side effects from sildenafil: Taking sildenafil with certain medications raises your risk for side effects from sildenafil. This is because the amount of sildenafil in your body is increased. Examples of these drugs include:

For PAH: This medication may not work as well or may stop working completely. For this drug to work well, a certain amount needs to be in your body at all times.

All possible dosages and drug forms may not be included here. Your dosage, drug form, and how often you take the drug will depend on:

The use of drinks that contain alcohol raises your risk for low blood pressure from sildenafil. If you drink alcohol, talk with your doctor. You may need to have your blood pressure monitored while you take this drug.

O uso de sildenafila é contraindicado para pacientes que fazem tratamento com medicamentos da classe dos nitratos, grupo de medicamentos demasiado usados no terapia da angina.

Use in children warning: Children generally should not take sildenafil; however, there are instances where viagra the drug is considered the best treatment option. Talk with your child’s doctor to better understand the benefits and risks associated with this treatment option.

A prescription for this medication is refillable. You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription.

If you take too much: You could have dangerous levels of the drug in your body. Symptoms of an overdose of this drug can include:

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