 <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]  size. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day. If you use antacids containing aluminum or magnesium, do not take them at the same time as sotalol. These antacids can bind to sotalol and decrease its absorption and effectiveness. Separate doses of these antacids and sotalol by at least 2 hours to reduce this interaction. Do not take more of this drug than prescribed because you may increase your risk of side effects, including a new serious abnormal heartbeat. Do not take less of this medication or skip doses unless directed by your doctor. Your fast/irregular heartbeat is more likely to return if you do not take sotalol properly. Also, do not run out of this medication. Order your refills several days early to avoid running out of pills. Tell your doctor if your condition does not improve or if it worsens.The side effects of Sotalol Oral: See also Warning section. Tiredness, slow heartbeat, and dizziness may occur. Less common side effects include headache, diarrhea, and decreased sexual ability. If any of these effects last or get worse, tell your doctor or pharmacist promptly. </s>