Always inform your doctor about all medications you are taking, including over-the-counter drugs, herbal supplements, and recreational drugs, before starting Viagra or any other medication.
Nitrates and Viagra: A Dangerous Combination
Combining Viagra with nitrates, often found in medications for chest pain (angina), can cause a dangerous drop in blood pressure. This interaction can lead to severe complications, including fainting, heart attack, or stroke. Avoid using Viagra if you take nitrates.
Other Medications to Consider
- Alpha-blockers: These drugs, used to treat high blood pressure and enlarged prostate, can increase the risk of low blood pressure when taken with Viagra. Your doctor might adjust your dosages or recommend alternatives. CYP3A4 inhibitors: Some medications, like antifungal drugs (ketoconazole, itraconazole) and macrolide antibiotics (erythromycin, clarithromycin), can affect how your body processes Viagra, potentially increasing its effects and side effects. Your doctor may need to adjust your Viagra dosage. CYP3A4 inducers: Conversely, certain medications like rifampin (an antibiotic) and St. John’s Wort (an herbal supplement) can speed up Viagra’s metabolism, potentially reducing its effectiveness. Your doctor may recommend a dosage adjustment or an alternative medication.
Alcohol and Grapefruit Juice
Excessive alcohol consumption can worsen Viagra’s side effects, such as dizziness and headaches. Similarly, grapefruit juice can interact with Viagra’s metabolism, potentially leading to increased blood levels of the drug. Moderate alcohol intake and avoidance of grapefruit juice are recommended.
Always Consult Your Physician
This information is not exhaustive. Individual responses to medication interactions vary widely. Always consult your doctor or pharmacist before taking Viagra concurrently with any other medications to ensure your safety and optimal treatment.
Specific Medication Interactions
Specific interactions may depend on the specific nitrate medication, alpha-blocker, or other drug being taken. Your doctor can provide specific guidance based on your individual health status and medication profile. Never self-adjust your medication dosages.
