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Mirtazapine, Oral mir-TAZ-a-peen

What are other names for this medicine?

Type of medicine: antidepressant

Generic and brand names: mirtazapine, oral; Remeron; Remeron SolTab

What is this medicine used for?

This medicine is taken by mouth to treat depression.

It may be used for other conditions as determined by your healthcare provider.

What should my healthcare provider know before I take this medicine?

Before taking this medicine, tell your healthcare provider if you have ever had:

  • an allergic reaction to any medicine
  • glaucoma
  • high or low blood pressure
  • heart disease or a heart attack
  • a stroke
  • high cholesterol
  • low levels of sodium in the blood
  • liver or kidney disease
  • mental illness such as bipolar disorder, paranoia, or schizophrenia
  • phenylketonuria (PKU). The SolTab contains phenylalanine.
  • seizures
  • thoughts of suicide

Do not take this medicine if you have taken an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline, or tranylcypromine (Parnate) within the last 14 days.

Females of childbearing age: Tell your healthcare provider if you are pregnant or plan to become pregnant. It is not known whether this medicine will harm an unborn baby. Do not breast-feed while taking this medicine without your healthcare provider's approval.

How do I take it?

Read the Medication Guide that comes in the medicine package when you start taking this medicine and each time you get a refill.

Check the label on the medicine for directions about your specific dose. Take this medicine exactly as your healthcare provider prescribes. Do not take more of it or take it longer than prescribed. Do not stop taking this medicine without your healthcare provider's approval. You may have to reduce your dosage gradually. Stopping too quickly may cause withdrawal symptoms.

Usually you will take your daily dose at bedtime because this medicine may make you drowsy.

If you have the dissolving tablet form of this medicine, open the blister pack with dry hands, place the tablet on your tongue immediately, and let the tablet dissolve, Water is NOT needed to take the tablet. Do not crush, break, or chew the dissolving tablet.

What if I miss a dose?

If you miss a dose, take it as soon as you remember unless it is almost time for the next scheduled dose. In that case, skip the missed dose and take the next one as directed. Do not take double doses. If you are not sure of what to do if you miss a dose, or if you miss more than one dose, contact your healthcare provider. Do not stop taking this medicine without your healthcare provider's approval. You may need to reduce your dose slowly to avoid withdrawal symptoms.

What if I overdose?

If you or anyone else has intentionally taken too much of this medicine, call 911 or go to the emergency room right away. If you pass out, have seizures, weakness or confusion, or have trouble breathing, call 911. If you think that you or anyone else may have taken too much of this medicine, call the poison control center. Do this even if there are no signs of discomfort or poisoning. The poison control center number is 800-222-1222.

Symptoms of an acute overdose may include: confusion, memory problems, drowsiness, fast heartbeat.

What should I watch out for?

Antidepressant medicines may increase suicidal thoughts or actions in some children, teenagers, and young adults within the first few months of treatment. Talk with your provider about this.

Behavior changes may be caused by the medicine or by depression or another mental illness. Contact your provider right away if you or your family notice any disturbing changes in your thoughts or behavior, such as:

  • more outgoing or aggressive behavior than normal
  • confusion
  • hallucinations
  • worsening of depression
  • suicidal thoughts.

It may take several weeks before you start to feel better. Do not stop taking this medicine unless your healthcare provider tells you to do so. You may have withdrawal symptoms if you stop this medicine abruptly.

This medicine increases the effects of alcohol and other drugs that slow down your nervous system. Do not drink alcohol or take other medicines unless your healthcare provider approves.

This medicine may make you dizzy or drowsy or cause blurred vision. Do not drive or operate machinery unless you are fully alert.

You may feel dizzy or faint when you get up quickly after sitting or lying down. Getting up slowly may help.

If you need emergency care, surgery, or dental work, tell the healthcare provider or dentist you are taking this medicine.

Adults over the age of 65 may be at greater risk for side effects. Talk with your healthcare provider about this.

This medicine may cause serotonin syndrome, which can be life-threatening. It may be caused by taking this medicine with other medicines. These medicines include other antidepressants, medicines to treat migraines, pain medicines, some cough medicines, St. John's wort, and others. Make sure that your providers know ALL of the medicines that you take.

Contact your healthcare provider right away if you have:

  • restlessness
  • loss of coordination
  • fast heart beat
  • rapid changes in blood pressure
  • increased body temperature
  • nausea
  • vomiting
  • diarrhea

This medicine may increase your blood level of cholesterol. Talk to your healthcare provider about this.

What are the possible side effects?

Along with its needed effects, your medicine may cause some unwanted side effects. Some side effects may be very serious. Some side effects may go away as your body adjusts to the medicine. Tell your healthcare provider if you have any side effects that continue or get worse.

Life-threatening (Report these to your healthcare provider right away. If you are unable to reach your healthcare provider right away, get emergency medical care or call 911 for help): Allergic reaction (hives; itching; rash; trouble breathing; tightness in your chest; swelling of your lips, tongue, and throat).

Serious (report these to your healthcare provider right away): Chest pain; chills; dark urine; fast or irregular heartbeat; hallucinations; high fever; rash; heavy sweating; lightheadedness and fainting; loss of bladder control; muscle or joint pain; numbness or tingling in the hands or feet; prolonged erection; seizures; severe confusion; severe drowsiness; severe muscle stiffness; thoughts of suicide; trouble urinating; twitching or involuntary movement of your body or face; unusual excitement; yellowing of your eyes or skin; unexplained sore throat; mouth sores.

Other: Abnormal dreams, vision problems, constipation, diarrhea, dizziness, drowsiness, dry mouth, increased appetite, increased or decreased interest in sex, lightheadedness, nausea, trouble sleeping, weight gain or loss, headache, change in sense of taste, bloating.

What products might interact with this medicine?

When you take this medicine with other medicines, it can change the way this or any of the other medicines work. Nonprescription medicines, vitamins, natural remedies, and certain foods may also interact. Using these products together might cause harmful side effects. Talk to your healthcare provider if you are taking:

  • antiarrhythmics (medicine to treat irregular heartbeat) such as amiodarone (Cordarone, Pacerone), disopyramide (Norpace), flecainide (Tambocor), procainamide, propafenone (Rythmol), and quinidine
  • antibiotics such as clarithromycin (Biaxin), erythromycin (Erythrocin, EES, E-Mycin, EryPed), ciprofloxacin (Cipro), isoniazid (Laniazid), levofloxacin (Levaquin), linezolid (Zyvox), norfloxacin (Noroxin), ofloxacin (Floxin), metronidazole (Flagyl), pentamidine (NebuPent), rifampin (Rifampin, Rimactane), and rifabutin (Mycobutin)
  • antidepressants such as amitriptyline, amoxapine, bupropion (Wellbutrin, Zyban), citalopram (Celexa), clomipramine (Anafranil), desipramine (Norpramin), desvenlafaxine (Pristiq), doxepin, duloxetine (Cymbalta), escitalopram (Lexapro), fluoxetine (Prozac), fluvoxamine (Luvox CR), imipramine (Tofranil), paroxetine (Paxil), nefazodone, nortriptyline (Pamelor), protriptyline (Vivactil), sertraline (Zoloft), trimipramine (Surmontil), and venlafaxine (Effexor)
  • antiseizure medicines such as carbamazepine (Tegretol), felbamate (Felbatol), gabapentin (Neurontin), lamotrigine (Lamictal), levetiracetam (Keppra), oxcarbazepine (Trileptal), phenytoin (Dilantin), primidone (Mysoline), tiagabine (Gabitril), topiramate (Topamax), and valproic acid (Depakote, Depakene)
  • antifungals such as fluconazole (Diflucan), itraconazole (Sporanox), and ketoconazole (Nizoral)
  • antihistamines such as chlorpheniramine (Chlor-Trimeton), clemastine (Tavist), diphenhydramine (Benadryl), and hydroxyzine (Vistaril)
  • antinausea medicines such as prochlorperazine and promethazine (Phenergan)
  • antipsychotic medicines such as chlorpromazine, clozapine (Clozaril), fluphenazine, haloperidol (Haldol), loxapine (Loxitane), olanzapine (Zyprexa), perphenazine, pimozide (Orap), risperidone (Risperdal), thioridazine, trifluoperazine, and ziprasidone (Geodon)
  • anti-HIV medicines such as indinavir (Crixivan), nelfinavir (Viracept), ritonavir (Norvir, Kaletra), and saquinavir (Invirase)
  • aspirin and other salicylates
  • barbiturates such as butabarbital (Butisol), pentobarbital (Nembutal), and phenobarbital
  • benzodiazepines such as alprazolam (Xanax), diazepam (Valium), lorazepam (Ativan), and triazolam (Halcion)
  • beta blockers such as acebutolol (Sectral), atenolol (Tenormin), carvedilol (Coreg), labetalol (Trandate), metoprolol (Lopressor, Toprol XL), nadolol (Corgard), pindolol, propranolol (Inderal LA), and sotalol (Betapace)
  • buspirone (BuSpar)
  • calcium channel blockers such as diltiazem (Cardizem, Tiazac), felodipine, isradipine (DynaCirc CR), nicardipine (Cardene), nifedipine (Adalat CC, Procardia), and verapamil (Calan, Covera-HS, Isoptin SR, Verelan)
  • cyclosporine (Sandimmune, Neoral, Gengraf)
  • ergotamine tartrate (Ergomar)
  • heartburn medicines such as cimetidine (Tagamet), famotidine (Pepcid, Pepcid AC, Pepcid Complete), nizatidine (Axid), and ranitidine (Zantac, Zantac 75)
  • natural remedies such as gotu kola, kava, St. John's wort, SAMe, and valerian
  • isoniazid (Laniazid, Nydrazid)
  • linezolid (Zyvox)
  • lithium (Lithobid)
  • MAO inhibitor antidepressants such as isocarboxazid (Marplan), phenelzine (Nardil), selegiline (Eldepryl, Emsam), and tranylcypromine (Parnate) (Do not take this medicine and an MAO inhibitor within 14 days of each other.)
  • medicines to relax your intestines such as atropine sulfate (Atropair), clidinium bromide (Quarzan), glycopyrrolate (Robinul), mepenzolate bromide (Cantil), and propantheline bromide (Pro-Banthine)
  • muscle relaxants such as baclofen (Lioresal), carisoprodol (Soma), cyclobenzaprine (Flexeril), dantrolene (Dantrium), methocarbamol (Robaxin), and tizanidine (Zanaflex)
  • narcotic pain medicines such as codeine, fentanyl (Duragesic, Actiq), hydrocodone/acetaminophen (Vicodin), hydromorphone (Dilaudid), meperidine (Demerol), morphine (Kadian, MS Contin), methadone (Dolophine), oxycodone (OxyContin, Roxicodone), oxycodone/acetaminophen (Percocet, Tylox), and pentazocine (Talwin)
  • procarbazine (Matulane)
  • products that contain methylene blue (Prosed DS, Utira-C, Urelle, Utrona-C)
  • sedatives such as eszopiclone (Lunesta), zaleplon (Sonata), and zolpidem (Ambien)

Do not drink alcohol while you are taking this medicine.

If you are not sure if your medicines might interact, ask your pharmacist or healthcare provider. Keep a list of all your medicines with you. List all the prescription medicines, nonprescription medicines, supplements, natural remedies, and vitamins that you take. Be sure that you tell all healthcare providers who treat you about all the products you are taking.

How should I store this medicine?

Store this medicine at room temperature. Keep the container tightly closed. Protect it from heat, high humidity, and bright light.


This advisory includes selected information only and may not include all side effects of this medicine or interactions with other medicines. Ask your healthcare provider or pharmacist for more information or if you have any questions.

Ask your pharmacist for the best way to dispose of outdated medicine or medicine you have not used. Do not throw medicine in the trash.

Keep all medicines out of the reach of children.

Do not share medicines with other people.


Developed by RelayHealth.
Medication Advisor 2012.1 published by RelayHealth.
Last modified: 2011-10-31
Last reviewed: 2010-03-09
This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.
© 2012 RelayHealth and/or its affiliates. All rights reserved.
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