Before taking trazodone,
tell your doctor and pharmacist if you are allergic to trazodone or any other medications.
tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: anticoagulants ('blood thinners') such as warfarin (Coumadin); antidepressants; antifungals such as ketoconazole (Nizoral), itraconazole (Sporanox), or voriconazole (Vfend); aspirin and other NSAIDs such as ibuprofen (Advil, Motrin) and naproxen (Aleve, Naprosyn); certain medications for human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS) such as atazanavir (Reyataz), indinavir (Crixivan), nelfinavir (Viracept), ritonavir (Norvir, in Kaletra), and saquinavir (Invirase); cimetidine (Tagamet); cisapride (Propulsid); clarithromycin (Biaxin, in Prevpac); cyclosporine (Neoral, Sandimmune); danazol (Danocrine); delavirdine (Rescriptor); dexamethasone (Decadron); digoxin (Digitek, Lanoxin, Lanoxicaps); diltiazem (Cardizem, Dilacor, Tiazac); diuretics; disopyramide (Norpace); dofetilide (Tikosyn); erythromycin (E.E.S., E-Mycin, Erythrocin); isoniazid (INH, Nydrazid); medications for allergies, cough or colds; medications for anxiety, high blood pressure, irregular heartbeat, mental illness or pain; medication for seizures such as carbamazepine (Tegretol), ethosuximide (Zarontin), phenobarbital (Luminal, Solfoton), and phenytoin (Dilantin); linezolid (Zyvox); methylene blue; metronidazole (Flagyl); muscle relaxants; nefazodone; oral contraceptives (birth control pills); procainamide (Procanbid, Pronestyl); quinidine; rifabutin (Mycobutin); rifampin (Rifadin, Rimactane); sedatives; selective serotonin reuptake inhibitors (SSRIs) such as fluoxetine (Prozac, Sarafem) and fluvoxamine (Luvox); sleeping pills; tranquilizers; sotalol (Betapace, Betapace AF); telithromycin (Ketek); thioridazine; troleandomycin (TAO); verapamil (Calan, Isoptin, Verelan); or zafirlukast (Accolate). Also, tell your doctor or pharmacist if you are taking the following medications, called MAO inhibitors, or if you have stopped taking them within the past 2 weeks: isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), or tranylcypromine (Parnate). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have severe diarrhea or vomiting or think you may be dehydrated or if you have recently had a heart attack. Also tell your doctor if you have or have ever had high blood pressure, sickle cell anemia (a disease of the red blood cells), multiple myeloma (cancer of the plasma cells), leukemia (cancer of the white blood cells) cavernosal fibrosis, Peyronie's disease (a condition that affects the shape of the penis such as angulation), or heart, liver or kidney disease.
Trazodone may cause QT prolongation (an irregular heart rhythm that can lead to fainting, loss of consciousness, seizures, or sudden death. Tell your doctor if you or anyone in your family has or has ever had long QT syndrome (an inherited condition in which a person is more likely to have QT prolongation) or if you have or have ever had low levels of potassium or magnesium in your blood or an irregular heartbeat.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking trazodone, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking trazodone.
you should know that trazodone may make you drowsy and affect your judgment. Do not drive a car or operate machinery until you know how this medication affects you.
ask your doctor about the safe use of alcoholic beverages while you are taking trazodone. Alcohol can make the side effects from trazodone worse.
you should know that trazodone may cause dizziness, lightheadedness, and fainting when you get up too quickly from a lying position. To avoid this problem, get out of bed slowly, resting your feet on the floor for a few minutes before standing up.
you should know that trazodone may cause angle-closure glaucoma (a condition where the fluid is suddenly blocked and unable to flow out of the eye causing a quick, severe increase in eye pressure which may lead to a loss of vision). Talk to your doctor about having an eye examination before you start taking this medication. If you have nausea, eye pain, changes in vision, such as seeing colored rings around lights, and swelling or redness in or around the eye, call your doctor or get emergency medical treatment right away.