 <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] ol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: certain heart rhythm problems (such as a slow heartbeat, sick sinus syndrome, second- or third-degree atrioventricular block unless you have a heart pacemaker), kidney problems, heart problems (such as heart failure, recent heart attack), breathing problems (such as asthma, chronic bronchitis, emphysema), overactive thyroid disease (hyperthyroidism), serious allergic reactions needing treatment with epinephrine. Sotalol may cause a condition that affects the heart rhythm (QT prolongation in the EKG). QT prolongation can rarely cause serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that need medical attention right away. The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may cause QT prolongation. Before using sotalol, tell your doctor or pharm </s>