Sildenafil
Brand: Viagra
No boxed warning on the current FDA label.
- Caution
- Contraindicated with nitrates (fatal blood pressure drop); seek care for an erection over 4 hours or sudden vision or hearing loss.
Common side effects
- Headache
- Flushing
- Nasal congestion
- Indigestion
- Visual color changes
Key interactions
- Do not use with nitrates; dangerous drop in blood pressure
- Alpha-blockers can add to low blood pressure
- Certain antifungals and HIV drugs raise its levels
Counseling points
- Take about an hour before activity
- Do not take with nitrate heart medicines
- Rise slowly to reduce dizziness
- Seek care for erection lasting over 4 hours
- Report sudden vision or hearing loss
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High-yield study aid for exam prep, not a substitute for the package insert or a pharmacist’s dispensing reference.