Tadalafil 20mg, while generally safe, can cause side effects. Common ones include headache, flushing, nasal congestion, and indigestion. These usually are mild and temporary. Less common but more serious side effects include vision changes (blurred vision, blue-tinged vision), hearing loss, and prolonged erection (priapism). Seek immediate medical attention if you experience a prolonged erection lasting more than four hours or sudden vision or hearing loss.
Side Effects Requiring Medical Attention
Serious side effects, although rare, demand prompt medical help. These include chest pain, irregular heartbeat, and dizziness. If you experience any of these, contact a doctor immediately. Remember, this information isn’t a substitute for professional medical advice; always consult your physician before starting or stopping any medication.
Drug Interactions
Tadalafil interacts with certain medications. Nitrates, commonly used to treat angina (chest pain), are a particularly dangerous combination. Taking them together can cause a significant drop in blood pressure, potentially leading to a medical emergency. Other medications that can interact include alpha-blockers (used to treat high blood pressure), antifungal medications (like ketoconazole and itraconazole), and HIV protease inhibitors. Always inform your doctor about all medications, supplements, and herbal remedies you are taking.
| Nitrates | Severe drop in blood pressure | Avoid concurrent use |
| Alpha-blockers | Increased risk of low blood pressure | Monitor blood pressure |
| Antifungal medications (ketoconazole, itraconazole) | Increased tadalafil levels | Lower tadalafil dose may be needed |
| HIV protease inhibitors | Increased tadalafil levels | Lower tadalafil dose may be needed |
Additional Considerations
Grapefruit juice can also interact with tadalafil, increasing its levels in the blood. Limit or avoid grapefruit juice while taking this medication. Individuals with heart conditions, low blood pressure, or stroke history should discuss the risks with their physician before using Tadalafil.
