| Drug and Dosage | Use | Action | Assessment: Side Effects |
|---|---|---|---|
| Sildenafil citrate (Viagra)—PO 50 mg 0.5–4 hr before sexual activity | Erectile dysfunction | Vasodilation of nitric oxide in the corpus cavernosum of penis | Headache; cardiac arrest with sudden death; exfoliative dermatitis |
 NURSING IMPLICATIONS: High-fat meal delays drug action. Report to physician: headaches, flushing, chest pain indigestion, blurred vision, changes in color vision; safety issue if taking nitrates | |||