MedDataToolSildenafil is a medication used to treat erectile dysfunction, which is the inability to achieve or maintain an erection. It works by increasing blood flow to the penis when a man is sexually stimulated, helping to achieve an erection. The medication is taken as a tablet, usually starting at a dose of 50 mg about an hour before sexual activity, and it can be increased to a maximum of 100 mg or decreased to 25 mg based on how well it works for you, but it should not be taken more than once a day. It's important to know that sildenafil should not be taken if you are using nitrates, which are medications often prescribed for chest pain, as this can lead to serious drops in blood pressure. Additionally, if you are over 65 years old or have severe liver or kidney issues, you may need to start with a lower dose of 25 mg.
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Uses
- erectile dysfunction.
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Dosage
Take 50 mg about 1 hour before sexual activity.
Can be taken 30 minutes to 4 hours before sexual activity.
Maximum dose is 100 mg or minimum is 25 mg based on tolerance.
Do not take more than once a day.
Can be taken with or without food.
Always follow your doctor's specific instructions for your dose.
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Side effects
Common
Common side effects include headacheflushingand upset stomachOther common effects are nasal congestionback painand dizziness
Serious
Serious side effects may include prolonged erection or sudden hearing lossSeek immediate help for severe reactions like chest pain or vision changes
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Warnings
⚠ Important warnings
- Do not use with nitrates or nitric oxide donors.
- Use caution with alpha-blockers; start at a lower dose.
- Elderly patients and those with liver or kidney issues may need lower doses.
- Monitor blood pressure if taking with anti-hypertensives.
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Drug interactions
- Nitratescan cause severe low blood pressureCaution
- Alpha-blockersmay increase blood pressure-lowering effectsCaution
- Ritonavirincreases sildenafil levels significantlyMonitor
- Erythromycinraises sildenafil levels by 160%.Caution
Ask about this drug
Answers pulled from the FDA label only.
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Medical Disclaimer: This content is provided for informational and educational purposes only and is not intended as medical advice. Always consult a qualified healthcare provider before taking any medication.
Data Source: Publicly available drug labeling information from the U.S. Food and Drug Administration (FDA).
Data Source: Publicly available drug labeling information from the U.S. Food and Drug Administration (FDA).