 <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]  change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: other alpha blocker drugs (such as prazosin, terazosin). If you are also taking a drug to treat erectile dysfunction-ED or pulmonary hypertension (such as sildenafil, tadalafil), your blood pressure may get too low which can lead to dizziness or fainting. Your doctor may need to adjust your medications to minimize this risk. Other medications can affect the removal of tamsulosin from your body, which may affect how tamsulosin works. Examples include adagrasib, azole antifungals (such as itraconazole, ketoconazole), clarithromycin, cobicistat, HIV protease inhibitors (such as lopinavir), mifepristone, ribociclib, ritonavir, among others. Does Tamsulosin HCL interact with other drugs you are taking? Enter your medication into the WebMD interaction checker Check InteractionThe overdose of Tamsulosin Oral: If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. </s>