Always inform your doctor about all medications you’re taking, including over-the-counter drugs, supplements, and herbal remedies, before starting Viagra. This is crucial to avoid potentially dangerous interactions.
Nitrates and Viagra
Combining Viagra with nitrates, often prescribed for chest pain (angina), can cause a significant drop in blood pressure, potentially leading to dizziness, fainting, or even a heart attack. This combination is strictly contraindicated.
Alpha-blockers and Viagra
Alpha-blockers, used to treat high blood pressure and enlarged prostate, can also lower blood pressure. Taking Viagra with alpha-blockers may increase the risk of low blood pressure, especially upon standing. Your doctor may adjust your dosages or recommend alternatives.
CYP3A4 Inhibitors and Viagra
Certain medications, like some antifungals (ketoconazole, itraconazole) and HIV protease inhibitors (ritonavir, indinavir), inhibit the CYP3A4 enzyme, which metabolizes Viagra. This can increase Viagra’s concentration in your blood, potentially leading to side effects. Your doctor may adjust your Viagra dosage or suggest an alternative.
Other Medications
Several other medications can interact with Viagra, including some antidepressants, blood thinners, and certain antibiotics. Open communication with your healthcare provider ensures they can assess potential risks and manage your medications effectively. Never self-adjust dosages.
