Most Sildenafil side effects are mild, dose-related and settle as treatment continues. The reactions that matter clinically are rare but need to be recognised quickly.
Key takeaways
- Common effects: headache, facial flushing, nasal congestion, dyspepsia, transient blue-tinged vision.
- Avoid Sildenafil in anyone taking nitrates, riociguat or with recent cardiac events.
- Dose-related effects often resolve by stepping back one strength.
- Severe or persistent reactions warrant stopping and seeking review.
Frequency bands
| Frequency | Reactions | Action |
|---|---|---|
| Very common (>10%) | headache, facial flushing | Usually self-limiting; supportive measures and reassurance. |
| Common (1–10%) | nasal congestion, dyspepsia, transient blue-tinged vision | Review dose and timing; consider dose reduction. |
| Uncommon (<1%) | hypersensitivity, marked laboratory changes | Stop and arrange clinical assessment. |
| Rare | serious organ-specific reactions | Stop immediately; urgent medical attention. |
Reducing the burden
Take Sildenafil exactly as directed: 50 mg taken 30–60 minutes before intimacy, adjusted to 25 mg or 100 mg on response. Splitting titration into smaller steps, dosing with food where the label allows, and hydrating well cover most tolerability problems seen in practice.
Sildenafil at a glance
| Attribute | Detail |
|---|---|
| Drug class | PDE5 inhibitor |
| Common brand | Viagra |
| Licensed use | erectile dysfunction |
| Available strengths | 25 mg, 50 mg, 100 mg |
| Dosage form | film-coated tablet |
| Typical onset | 30–60 minutes |
| Duration / dosing interval | 4–6 hours |
| Storage | 15–30 °C, dry, original blister |
