Always discuss Viagra dosage with your doctor. The standard starting dose is 50mg, but it can range from 25mg to 100mg depending on your individual needs and your doctor’s assessment.
Taking Viagra with certain medications can lead to dangerous interactions. It’s crucial to inform your doctor about all medications you’re currently taking, including over-the-counter drugs, supplements, and herbal remedies. This includes nitrates (often used to treat chest pain), alpha-blockers (used for high blood pressure or prostate problems), and certain antifungals. Combining Viagra with these medications can significantly lower blood pressure, potentially causing dizziness, fainting, or even a heart attack.
Specific examples of medications that interact negatively with Viagra include:
| Nitrates | Nitroglycerin, isosorbide mononitrate | Severe hypotension |
| Alpha-blockers | Terazosin, Doxazosin | Significant blood pressure drop |
| CYP3A4 Inhibitors | Ketoconazole, erythromycin | Increased Viagra levels in the blood |
| CYP3A4 Inducers | Rifampin, St. John’s Wort | Decreased Viagra levels in the blood |
Grapefruit juice also interacts with Viagra, inhibiting its metabolism and increasing its concentration in the blood. Avoid grapefruit juice while taking Viagra.
Your doctor will help determine the safest and most effective Viagra dosage for you, considering your medical history and any other medications you are taking. They will also provide guidance on managing potential drug interactions.
