Important Safety Information for Viagra® (sildenafil)
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Here's a revised version of the information about sildenafil:
**Sildenafil Information**
**FDA-Approved Use:**
Sildenafil is a phosphodiesterase-5 (PDE5) inhibitor indicated for the treatment of erectile dysfunction (ED).
**Who Should Avoid Sildenafil:**
Avoid sildenafil if:
- You are taking nitric oxide donors like organic nitrates or nitrites.
- You have a known allergy to sildenafil.
- You are taking guanylate cyclase stimulators such as riociguat.
**How to Take Sildenafil:**
- Take sildenafil with or without food approximately 30 minutes to 1 hour before sexual activity.
- Do not exceed one dose in a 24-hour period or combine with other ED medications or PDE-5 inhibitors.
- Follow your provider's instructions for best results.
**Important Information for Your Provider:**
Inform your provider about all medications, medical history, and conditions you have before using sildenafil, including:
- Cardiovascular risks
- Predisposition to priapism
- Ventricular outflow obstruction
- History of myocardial infarction, stroke, or arrhythmia
- Low or high blood pressure
- Bleeding disorders, ulcers, kidney or liver disease, pulmonary hypertension, retinitis pigmentosa
**Serious Side Effects to Monitor:**
Monitor for and seek medical attention for:
- Prolonged erections lasting more than 4 hours
- Sudden vision or hearing loss
- Signs of lowered blood pressure, fainting, or prolonged erection when combining with alpha-blockers, ritonavir, or other PDE-5 inhibitors
**Common Side Effects:**
Common side effects of sildenafil may include:
- Headache
- Flushing
- Indigestion
- Changes in vision
- Nasal congestion
- Back or muscle pain
- Nausea
- Dizziness
- Rash
**Reporting Side Effects:**
Report any negative side effects to the FDA at www.fda.gov/medwatch or call 1-800-FDA-1088.
**Note:** This information is not exhaustive. Refer to the full Prescribing Information for complete safety details.
