Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Behaviour changes and suicidal thoughts: This medication may worsen symptoms of depression, including thoughts of suicide or wanting to harm themselves or others. It may also cause agitated or aggressive behaviour. If you experience these symptoms or any other behaviour change while taking this medication, contact your doctor immediately. Family members or caregivers of people who are taking this medication should contact the person's doctor immediately if they notice unusual behaviour changes.Heart rhythm: Trazodone can cause changes to the normal rhythm of the heart, including an irregular heartbeat called QT prolongation. QT prolongation is a serious life-threatening condition that can cause fainting, seizures, and sudden death. If you are at risk for heart rhythm problems (e.g., people with heart failure, angina, low potassium or magnesium levels), discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
Blood pressure: Trazodone may cause low blood pressure and possibly cause a feeling of lightheadedness when moving from a sitting or lying position to a standing position.
Dizziness: Trazodone can cause severe dizziness, especially when rising from a sitting or lying position. People taking medications that can cause dizziness should rise slowly from sitting or lying down to reduce the possibility of severe dizziness or fainting
Drowsiness/reduced alertness: Trazodone may impair the mental or physical abilities required for potentially hazardous tasks, such as driving or operating machinery. Avoid undertaking such activities while taking trazodone until you determine that you are not affected in this way.
Priapism: Trazodone has been associated with prolonged or inappropriate erections (priapism) for a number of men taking this medication. If this occurs, stop taking the medication immediately and contact your doctor.
Seizures: Seizures have been reported for a small number of people taking trazodone. Most of these people were already taking medications for a previously diagnosed seizure disorder.
severe, life-threatening reactions are possible when trazodone is combined with other medications that act on serotonin, such as tricyclic antidepressants and serotonin reuptake inhibitors, which are other medications used to treat depression. This is called serotonin syndrome. These combinations should be avoided. Symptoms of a reaction may include muscle rigidity and spasms, difficulty moving, changes in mental state including delirium and agitation. Coma and death are possible.
Pregnancy: The safety of trazodone for use during pregnancy has not been established. It should not be used by women who may become pregnant unless, in the opinion of their doctor, the expected benefits outweigh the potential risks. If you are or may be pregnant, talk to your doctor about the risks and benefits of this medication.
Breast-feeding: This medication should not be used by breast-feeding mothers unless the benefits outweigh the risks to the child. If you are breast-feeding, talk to your doctor about the risks and benefits of this medication.
Children and adolescents: The safety and effectiveness of trazodone have not been established for people less than 18 years of age.