Sildenafil
Brand: Viagra
Key warning
Caution: combining with nitrates can cause a fatal drop in blood pressure
Common side effects
- Headache
- Flushing
- Nasal congestion
- Indigestion
- Visual color changes
Key interactions & cautions
- 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
High-yield study aid for exam prep — not a substitute for the package insert or a pharmacist’s dispensing reference.