Tamsulosin should not normally be taken twice a day. Tamsulosin is indicated for the treatment of dysuria due to prostate enlargement, and its standard use is one capsule once daily, so it cannot be taken twice a day. However, it may be increased or decreased depending on age and symptoms, but only under the evaluation and guidance of a physician. This drug may cause adverse reactions such as disorientation, loss of consciousness, drop in blood pressure, rash, nausea, vomiting, abnormal liver function, etc. It is contraindicated in allergic individuals, and used with caution in postural hypotension, renal insufficiency, severe hepatic insufficiency, and sulfonamide allergy. Those with urinary abnormalities need to go to the hospital in time, do not self-medicate. If there is any adverse reaction after taking the drug, you need to stop the drug in time and seek medical advice.