Before taking this medication, it is best to advise your doctor if you are allergic to Trimipramine; or to other tricyclic antidepressants (e.g., amitriptyline, imipramine); or to any other medications or allergies in general. This product may contain inactive ingredients, which can cause allergic reactions or other problems.
You should also let your doctor know of all of your medical history. Especially if you have ever dealt with any of these experiences in the past; blood problems (e.g., agranulocytosis, thrombocytopenia), breathing problems (e.g., asthma, chronic obstructive pulmonary disorder-COPD), diabetes, electroshock therapy, personal or family history of glaucoma (angle-closure type), heart problems (e.g., recent heart attack, arrhythmias, coronary artery disease), intestinal problems (e.g., chronic constipation, ileus), kidney problems, liver problems, other mental/mood conditions (e.g., bipolar disorder, psychosis), family history of mental/mood conditions (e.g., suicide, bipolar disorder), seizures, conditions that may increase your risk of seizures (e.g., bulimia, organic brain disease, alcohol withdrawal), overactive thyroid (hyperthyroidism), problems urinating (urinary retention, enlarged prostate).
Trimipramine 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 trimipramine, 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 problems (QT prolongation in the EKG, sudden cardiac death).
Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating, diarrhea, or vomiting. Talk to your doctor about using trimipramine safely.