Revatio (Sildenafil Citrate) Drug Information: Overdosage and Contraindications

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May 27, 2012

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Pulmonary Hypertension »

What are pulmonary arteries?

The human body has two major sets of blood vessels that distribute blood from the heart to the body. One set pumps blood from the right heart to the lungs and the other from the left heart to the rest of the body.

The portion of the circulation that distributes oxygen-rich blood from the left side of the heart, throughout the body, is referred to as the systemic circulation.
The blood then returns from the body to the right side of the heart and passes through the lungs to replenish oxygen.
It then returns to the left side of the heart for another round through the systemic circulation.
The portion of the circulation that distributes the blood from the right side of the heart to the lungs is referred to as the pulmonary (lung) circulation.
The pulmonary arteries are the major blood vessels that carry blood from the rig...

Read the Pulmonary Hypertension article »

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OVERDOSE

In studies with healthy volunteers of single doses up to 800 mg, adverse events were similar to those seen at lower doses but rates and severities were increased.

In cases of overdose, standard supportive measures should be adopted as required. Renal dialysis is not expected to accelerate clearance as sildenafil is highly bound to plasma proteins and it is not eliminated in the urine.

CONTRAINDICATIONS

Use with Organic Nitrates

Do not use REVATIO (sildenafil citrate) in patients taking organic nitrates in any form, either regularly or intermittently. Consistent with its known effects on the nitric oxide/cGMP pathway, sildenafil was shown to potentiate the hypotensive effects of nitrates.

Hypersensitivity Reactions

REVATIO (sildenafil citrate) is contraindicated in patients with a known hypersensitivity to sildenafil or any component of the tablet or injection.

Rare cases of hypersensitivity have been reported in association with the use of sildenafil including anaphylactic reaction/shock events and anaphylactoid reaction. The majority of reported events were non-serious hypersensitivity reactions.

Last reviewed on RxList: 12/29/2010
This monograph has been modified to include the generic and brand name in many instances.