Trazodone can be lethal if more then the prescribed dose is taken, but instances are rare, according to MedlinePlus. The average dose for an outpatient adult ranges from 150 milligrams to 400 milligrams a day, usually in divided doses. The maximum dosage for inpatients is 600 milligrams in divided doses.
Trazodone is an antidepressant that is given to patients who are struggling with depression symptoms, states Drugs.com. There is a risk of suicidal thoughts when starting any antidepressant, which should be monitored by a doctor. Patients who are prescribed the drug should be aware of side effects, such as blurry vision. Trazodone should never be mixed with alcohol.