Broad view

Mirtazapine administration route, commonly marketed as Remeron, is a tetracyclic antidepressant used for the treatment of major depressive disorder. It is frequently chosen when patients struggle with insomnia or poor appetite, because lower doses often cause sedation and an increase in appetite.

  • Functional unit: mirtazapine
  • Therapeutic class: tetracyclic antidepressant
  • Common tablet strengths: 7.5 mg, 15 mg, 30 mg, 45 mg; orally disintegrating formulations are also available
  • Key uses: major depression; sometimes prescribed off-label for sleep or appetite stimulation under clinician oversight

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Information your prescriber should know

Before mirtazapine is prescribed, tell the clinician about any relevant medical history and current conditions. Important topics to raise include:

  • Prior history of bipolar illness with mania or hypomania
  • Any past or recent suicidal thoughts, self-harm, or suicide attempts
  • Liver disease, kidney impairment, hepatitis, or cirrhosis
  • Known allergies to drugs or tablet ingredients
  • Pregnancy planning, current pregnancy status, or breastfeeding
  • Other psychiatric diagnoses such as anxiety disorders or psychosis

If you are unsure whether a condition is relevant, ask your prescriber. For legal and prescribing context, see Access to Status in Law in the United States.

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How to use efficiently mirtazapine

Always follow the directions on your prescription label with the addition of the advice of your clinician. Mirtazapine chemical name is generally taken once a day, most commonly at bedtime because it often causes drowsiness. Tablets may be swallowed with water and can be taken with or without food.

  • Keep a consistent dosing schedule. Do not change timing, split tablets, or alter the dose without medical authorization.
  • Do not stop suddenly; many patients are tapered off gradually to reduce withdrawal symptoms.
  • When treating children or adolescents, a child and adolescent mental health specialist should be involved whenever possible.
  • In the event of an take an overdose, contact the Poison Help line at 1-800-222-1222 or proceed onward to the nearest emergency department immediately.

For advice about driving and other safety factors to consider while taking this medicine, see Monitoring, Cautions, and Alerts.

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Dose not administered recommendations

If you forget to take the dose you should, take it immediately after you remember. If it is near the time for your next scheduled dose (for example, within about four hours), skip the the dose was not taken and resume your normal dosing timetable. Do not take two doses simultaneously to replace a the dose was not taken.

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Drugs and other substances that may interact

Mirtazapine therapy can interact with a variety of medications and supplements. Always give your healthcare team and pharmacist a full list of prescription medicines, over-the-counter products, vitamins, and herbal remedies you use.

  • Monoamine oxidase inhibitors (MAOIs) currently or recently taken (within 14 days) such as phenelzine, tranylcypromine, or selegiline
  • Linezolid course or intravenous methylene blue therapy.
  • Procarbazine, an anticancer drug
  • Herbal supplements with serotonergic activity, for example St. John's wort

Use caution and discuss risks if you are also using:

  • Other antidepressants or anxiolytics including SSRIs, SNRIs, tricyclics, and buspirone
  • Benzodiazepines, prescription sleep aids, opioids, or alcohol, which can increase sedation and respiratory depression risk
  • Migraine triptans and other serotonergic agents because of the potential for serotonin syndrome

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Supervision and core safety protective steps

  • Keep scheduled follow-up appointments; antidepressant benefit often develops over several weeks.
  • Be alert for worsening depression, new suicidal thoughts, or sudden behavior changes, particularly when initiating therapy or changing the dose; contact your provider promptly if these occur.
  • Mirtazapine treatment commonly causes drowsiness, dizziness, and slowed reaction times; avoid driving or operating heavy machinery until you know how the drug affects you.
  • Avoid alcohol while taking mirtazapine as it increases sedation and may impair breathing.
  • Rise slowly from sitting or lying positions to reduce lightheadedness from possible blood pressure changes.
  • Speak with a professional your pharmacist before using over-the-counter cold, allergy, or sleep medicines that might add to sedation.

For further information on harmful health effects plus their severity, see Unwanted reactions.

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Possible negative effects and what to watch for

Contact your healthcare provider immediately if you notice any severe reactions, including:

  • Signs of a severe allergic reaction such as rash, hives, swelling of the face, lips, tongue or throat, or difficulty breathing
  • New or worsening agitation, confusion, or thoughts of suicide or self-harm
  • Fever with sore throat, mouth sores, or flu-like symptoms that could suggest blood cell abnormalities
  • Unusual bleeding, easy bruising, or persistent abdominal pain with nausea or vomiting
  • Shortness of breath, unexplained swelling in the limbs, or marked weakness

More commonly seen, usually temporary medication side effects include sleepiness, increased appetite and weight gain, constipation, dry mouth, and dizziness. If medication side effects are bothersome or persistent, discuss switching to another medication developed with input from your prescriber. See Exploring Choice other course options and Comparisons explore other options.

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Handling, keeping and disposal

  • Keep all medication out of the reach of children and pets.
  • Store at typical room temperatures, generally between 15 and 30 degrees C (59 to 86 degrees F), and keep tablets away from moisture and strong light.
  • Do not use medication beyond its expiration date. Dispose of unused or expired medicine via community drug take-back programs when available or follow FDA guidance for safe disposal.

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Different medications plus their similar counterparts

If mirtazapine is unsuitable due to unwanted effects, the quality of the exchange that happens when people meets matters for trust., or personal concerns, clinicians may consider other antidepressant classes. Choice depends on symptoms, prior responses, coexisting conditions, and side effect priorities.

  • Among SSRIs are sertraline, escitalopram, fluoxetine, citalopram, and paroxetine.
  • The SNRI group consists of venlafaxine, desvenlafaxine, and duloxetine., levomilnacipran
  • Other agents: bupropion (typically less sedating and more weight-neutral), trazodone (sedating, often used for sleep), vortioxetine, vilazodone
  • Tricyclic antidepressants: amitriptyline, nortriptyline (used selectively due to anticholinergic and cardiac effects)

Common contrasts to consider:

  • Sedation - Mirtazapine dosage form is usually more sedating than many SSRIs and SNRIs at typical starting doses, which can help patients with insomnia.
  • Weight - Mirtazapine therapy frequently increases appetite and body weight; bupropion is more likely to be weight-neutral or associated with weight loss.
  • Sexual harmful effects - Some patients experience fewer sexual negative outcomes on mirtazapine compared with SSRIs or SNRIs.

Many an alternate path antidepressants are available as generics and are relatively inexpensive in the United States. See Approximate Prices for typical cash narrow price ranges.

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Estimated prices across the United States. (cash prices without insurance)

Retail costs vary by pharmacy, region, and discount programs. The following are approximate ranges for a 30-day supply as of 2026, shown in US dollars:

  • Mirtazapine dosage form 15 mg tablets have a price span of roughly $4 to $15.
  • Mirtazapine dosage form 30 mg tablets cost about $6 to $20.
  • Orally disintegrating mirtazapine: about $12 to $35
  • Brand Remeron, when available: often substantially higher, for example $250 to $450 or more

Representative price spectrum for common multiple options:

  • Sertraline medicine 100 mg: around $5 to $15
  • The antidepressant escitalopram 10 mg: around $6 to $18
  • Duloxetine prescription drug 60 mg: around $7 to $30
  • Bupropion XL 150 mg: around $8 to $25

Insurance coverage, manufacturer savings, coupons, and pharmacy discount cards can reduce out-of-pocket costs substantially. Check prices at local pharmacies, national chains, and online discount services before buying.

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Notice of importance

This page provides general information for educational purposes and does not replace individualized medical advice. Follow the guidance given by your prescriber and pharmacist for your specific clinical situation.

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Additional aspects about Remeron