 <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]  for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: problems urinating (such as due to enlarged prostate), breathing problems (such as bronchitis, emphysema), glaucoma, heart problems (such as irregular heartbeat), kidney problems, liver problems, overactive thyroid (hyperthyroidism), personal or family history of mental/mood conditions (such as bipolar disorder, psychosis, suicide), seizures, conditions that may increase your risk of seizures (such as other brain disease, alcohol withdrawal). Doxepin may cause a condition that affects the heart rhythm (QT prolongation). 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 doxepin, tell your doctor or pharmacist of all the drugs you take and if you have any of the following conditions: certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG), family history of certain heart </s>