 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  taking an alpha blocker medication (such as doxazosin, tamsulosin) to treat an enlarged prostate/BPH or high blood pressure, your blood pressure may get too low which can lead to dizziness or fainting. Your doctor may adjust your medications to minimize your risk of low blood pressure. Other medications can affect the removal of sildenafil from your body, which may affect how sildenafil works. Examples include azole antifungals (such as itraconazole, ketoconazole), cobicistat, macrolide antibiotics (such as clarithromycin, erythromycin), mifepristone, HIV protease inhibitors (such as saquinavir), rifampin, ritonavir, among others. Do not take this medication with any other product that contains sildenafil or other similar medications for erectile dysfunction-ED or pulmonary hypertension (such as tadalafil, vardenafil). Does Revatio interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Revatio Oral: If someone has overdosed and has serious symptoms such as passing out </s>