Before taking mirtazapine,
tell your doctor and pharmacist if you are allergic to mirtazapine, any other medications, or any of the ingredients in mirtazapine tablets or disintegrating tablets. Ask your doctor or pharmacist for a list of the ingredients.
tell your doctor if you are taking a monoamine oxidase (MAO) inhibitor such as isocarboxazid (Marplan), linezolid (Zyvox), methylene blue, phenelzine (Nardil), selegiline (Eldepryl, Emsam, Zelapar), and tranylcypromine (Parnate) or if you have stopped taking an MAO inhibitor within the past 14 days. Your doctor will probably tell you not to take mirtazapine. If you stop taking mirtazapine, you should wait at least 14 days before you start to take an MAO inhibitor.
tell your doctor and pharmacist what 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, Jantoven); antidepressants such as amitriptyline (Elavil), amoxapine (Asendin), clomipramine (Anafranil), desipramine (Norpramin), doxepin, imipramine (Tofranil), nortriptyline (Aventyl, Pamelor), protriptyline (Vivactil), and trimipramine (Surmontil); certain antifungals such as ketoconazole (Nizoral); buspirone; carbamazepine (Carbatrol, Epitol, Equetro, Tegretol, other); cimetidine (Tagamet); diazepam (Valium); erythromycin (E.E.S., E-mycin, Erythrocin); fentanyl (Abstral, Actiq, Fentora, Onsolis, others); lithium (Eskalith, Lithobid); medications for migraine headaches such as almotriptan (Axert), eletriptan (Relpax), frovatriptan (Frova), naratriptan (Amerge), rizatriptan (Maxalt), sumatriptan (Imitrex), and zolmitriptan (Zomig); certain medications to treat HIV; medications for anxiety and seizures; nefazodone; phenytoin (Dilantin); rifampin (Rimactane, Rifadin, in Rifater, in Rifamate); sedatives; selective serotonin reuptake inhibitors (SSRIs) such as citalopram (Celexa), escitalopram (Lexapro), fluoxetine (Prozac, Sarafem), fluvoxamine (Luvox), paroxetine (Paxil, Pexeva), and sertraline (Zoloft); selective serotonin and norepinephrine reuptake inhibitors (SNRIs) such as desvenlafaxine (Pristiq), duloxetine (Cymbalta), and venlafaxine (Effexor); sleeping pills; tramadol (Ultram); and tranquilizers. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor what herbal products you are taking, especially St. John's wort and tryptophan.
tell your doctor if you have or have ever had a heart attack, low blood pressure, heart, kidney, or liver disease, or high cholesterol.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking mirtazapine, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking mirtazapine.
you should know that this medication may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
remember that alcohol can add to the drowsiness caused by this medication.
if you have phenylketonuria (PKU, an inherited condition in which a special diet must be followed to prevent mental retardation), you should know that the orally disintegrating tablets contain aspartame that forms phenylalanine.
you should know that mirtazapine 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.