Remeron 15mg Tablets

Manufacturer ORGANON Active Ingredient Mirtazapine Tablets(mir TAZ a peen) Pronunciation mir-TAZ-uh-peen
WARNING: Drugs like this one have raised the chance of suicidal thoughts or actions in children and young adults. The risk may be greater in people who have had these thoughts or actions in the past. All people who take this drug need to be watched closely. Call the doctor right away if signs like depression, nervousness, restlessness, grouchiness, panic attacks, or changes in mood or actions are new or worse. Call the doctor right away if any thoughts or actions of suicide occur.This drug is not approved for use in children. Talk with the doctor. @ COMMON USES: It is used to treat depression.It may be given to you for other reasons. Talk with the doctor.
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Drug Class
Antidepressant
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Pharmacologic Class
Noradrenergic and Specific Serotonergic Antidepressant (NaSSA); Tetracyclic Antidepressant
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Pregnancy Category
Category C
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FDA Approved
Sep 1996
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Mirtazapine is a medication used to treat depression. It works by helping to restore the balance of certain natural substances (neurotransmitters) in the brain, which can improve mood and reduce symptoms of depression. It can also help with sleep and appetite.
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How to Use This Medicine

Taking Your Medication

To use this medication correctly, follow your doctor's instructions and read all the information provided. Take your medication as directed, and continue to take it even if you start to feel better. If this medication makes you sleepy, take it at bedtime. You can take it with or without food.

Storing and Disposing of Your Medication

Store your medication at room temperature, away from light and moisture. Keep it in a dry place, such as a closet or drawer, and avoid storing it in the bathroom. Keep all medications out of the reach of children and pets. When you're finished with your medication or it expires, dispose of it properly. Do not flush it down the toilet or pour it down the drain unless your doctor or pharmacist instructs you to do so. If you're unsure about how to dispose of your medication, ask your pharmacist for guidance. You may also want to check if there are any drug take-back programs in your area.

Missing a Dose

If you miss a dose, take it as soon as you remember. However, if it's close to the time for your next dose, skip the missed dose and resume your regular schedule. Do not take two doses at the same time or take extra doses to make up for a missed one.
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Lifestyle & Tips

  • Take Mirtazapine exactly as prescribed, usually once daily at bedtime due to its sedating effects.
  • Avoid alcohol and other CNS depressants (e.g., sedatives, tranquilizers) while taking this medication, as it can increase drowsiness and dizziness.
  • Be cautious when driving or operating machinery until you know how this medication affects you, especially at the start of treatment.
  • Do not stop taking Mirtazapine suddenly without consulting your doctor, as this can lead to withdrawal symptoms.
  • Report any unusual changes in mood or behavior, especially suicidal thoughts, to your doctor immediately.
  • Monitor your weight, as this medication can cause increased appetite and weight gain.

Dosing & Administration

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Adult Dosing

Standard Dose: 15 mg orally once daily at bedtime, initially
Dose Range: 15 - 45 mg

Condition-Specific Dosing:

majorDepressiveDisorder: Initial: 15 mg once daily at bedtime. Titrate every 1-2 weeks based on response and tolerability. Target range: 15-45 mg once daily. Max: 45 mg/day.
insomniaOffLabel: 7.5-15 mg orally once daily at bedtime (lower doses are more sedating due to H1 antagonism).
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not established (Safety and efficacy not established; use generally not recommended due to Black Box Warning for suicidality)
Adolescent: Not established (Safety and efficacy not established; use generally not recommended due to Black Box Warning for suicidality)
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Dose Adjustments

Renal Impairment:

Mild: No dosage adjustment necessary.
Moderate: Consider 30% reduction in total daily dose (e.g., 7.5 mg or 15 mg every other day, or 7.5 mg daily).
Severe: Consider 50% reduction in total daily dose (e.g., 7.5 mg every other day).
Dialysis: Not well studied; use with caution and monitor closely. Dosage adjustment likely needed.

Hepatic Impairment:

Mild: No dosage adjustment necessary.
Moderate: Consider 30% reduction in total daily dose (e.g., 7.5 mg or 15 mg every other day, or 7.5 mg daily).
Severe: Consider 50% reduction in total daily dose (e.g., 7.5 mg every other day).
Confidence: Medium

Pharmacology

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Mechanism of Action

Mirtazapine is a tetracyclic antidepressant that enhances central noradrenergic and serotonergic activity. It acts as an antagonist at central presynaptic alpha2-adrenergic autoreceptors and heteroreceptors, leading to an increase in norepinephrine and serotonin release. It is also a potent antagonist of 5-HT2 and 5-HT3 serotonin receptors, and a potent antagonist of histamine H1 receptors. It has moderate antagonism at peripheral alpha1-adrenergic receptors and muscarinic cholinergic receptors.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 50%
Tmax: Approximately 2 hours
FoodEffect: Food has minimal effect on Cmax and AUC, but may slightly delay Tmax.

Distribution:

Vd: 2.3-4.5 L/kg
ProteinBinding: Approximately 85%
CnssPenetration: Yes

Elimination:

HalfLife: 20-40 hours (average 26 hours)
Clearance: Not available (highly variable)
ExcretionRoute: Renal (approximately 75%), Fecal (approximately 15%)
Unchanged: Less than 10%
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Pharmacodynamics

OnsetOfAction: Sedative effects may be seen within hours to days. Antidepressant effects typically begin within 1-2 weeks, with full therapeutic effects potentially taking 4-6 weeks.
PeakEffect: Peak antidepressant effect typically seen after 4-6 weeks of consistent dosing.
DurationOfAction: Due to its long half-life, effects persist for at least 24 hours, allowing for once-daily dosing.

Safety & Warnings

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BLACK BOX WARNING

Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of Major Depressive Disorder (MDD) and other psychiatric disorders. Anyone considering the use of Mirtazapine or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need. Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction in risk with antidepressants compared to placebo in adults aged 65 and older. Depression and certain other psychiatric disorders are themselves associated with increases in the risk of suicide. Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior. Families and caregivers should be advised of the need for close observation and communication with the prescriber. Mirtazapine is not approved for use in pediatric patients.
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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention immediately:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of low sodium levels, including:
+ Headache
+ Trouble focusing
+ Memory problems
+ Feeling confused
+ Weakness
+ Seizures
+ Change in balance
Redness or irritation of the palms of hands or soles of feet
Flu-like symptoms
Mouth irritation or mouth sores
Restlessness
Fast or abnormal heartbeat
Severe dizziness or passing out
Joint pain

Serotonin Syndrome: A Potentially Life-Threatening Condition

There is a risk of developing serotonin syndrome, a severe and potentially deadly condition, especially when taking certain other medications. Seek medical help immediately if you experience:

Agitation
Change in balance
Confusion
Hallucinations
Fever
Fast or abnormal heartbeat
Flushing
Muscle twitching or stiffness
Seizures
Shivering or shaking
Sweating a lot
Severe diarrhea, upset stomach, or vomiting
Very bad headache

Severe Skin Reactions: Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN)

This medication may cause severe skin reactions, including SJS and TEN, which can be deadly. Seek medical help immediately if you notice:

Red, swollen, blistered, or peeling skin
Red or irritated eyes
Sores in your mouth, throat, nose, eyes, genitals, or any areas of skin
Fever
Chills
Body aches
Shortness of breath
Swollen glands

Other Side Effects

Most people experience no side effects or only minor side effects while taking this medication. However, if you notice any of the following side effects, contact your doctor or seek medical attention if they bother you or do not go away:

Feeling dizzy, sleepy, tired, or weak
Constipation
Dry mouth
Increased appetite
Weight gain
Strange or odd dreams

Reporting Side Effects

If you have questions about side effects or experience any side effects not listed here, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Worsening depression or suicidal thoughts/behavior (especially in young adults)
  • Signs of serotonin syndrome: agitation, hallucinations, rapid heart rate, fever, sweating, shivering, muscle stiffness/twitching, loss of coordination, nausea, vomiting, diarrhea.
  • Signs of infection (e.g., fever, sore throat, flu-like symptoms) - rare but serious risk of agranulocytosis.
  • Severe allergic reaction (e.g., rash, hives, swelling of face/lips/tongue, difficulty breathing).
  • Mania or hypomania (unusual excitement, racing thoughts, decreased need for sleep).
  • Dizziness or lightheadedness upon standing (orthostatic hypotension).
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction you experienced, including any symptoms that occurred.
If you are currently taking or have recently taken certain medications, such as:
+ Anxiety or sleep aids like alprazolam or diazepam
+ Depression or Parkinson's disease medications, including isocarboxazid, phenelzine, tranylcypromine, selegiline, or rasagiline, within the last 14 days, as this may increase the risk of very high blood pressure
+ Linezolid or methylene blue, as these medications can interact with this drug
Note that this is not an exhaustive list of all potential drug interactions or health problems that may affect the safety of this medication.

To ensure your safety, it is crucial to provide your doctor and pharmacist with a comprehensive list of:
All prescription and over-the-counter medications you are taking
Any natural products or vitamins you are using
Your complete medical history, including any health problems you have or have had

Before starting, stopping, or changing the dose of any medication, including this one, consult with your doctor to confirm that it is safe to do so in conjunction with your other medications and health conditions.
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Precautions & Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Please note that it may take several weeks to experience the full effects of this drug.

Do not abruptly stop taking this medication without consulting your doctor, as this may increase your risk of side effects. If you need to discontinue this drug, your doctor will instruct you on how to gradually stop taking it to minimize potential risks.

Until you are familiar with how this medication affects you, avoid driving and engaging in activities that require alertness. Some individuals may be at a higher risk of developing eye problems while taking this drug. Your doctor may recommend an eye exam to assess your risk. Immediately contact your doctor if you experience eye pain, changes in vision, or swelling and redness in or around the eye.

Rarely, this medication has been associated with low white blood cell counts, which can increase the risk of infection. If you have a history of low white blood cell counts, inform your doctor. Be vigilant for signs of infection, such as fever, chills, or sore throat, and contact your doctor promptly if you experience any of these symptoms.

This medication has been linked to abnormal heart rhythms (long QT on ECG) and, in rare cases, sudden death. Discuss these risks with your doctor. Additionally, this drug may cause elevated cholesterol and triglyceride levels. Consult with your doctor about monitoring your blood work as directed.

Avoid consuming alcohol while taking this medication. Before using marijuana, cannabis products, or prescription or over-the-counter drugs that may impair your reactions, consult with your doctor.

If you are 65 years or older, use this medication with caution, as you may be more susceptible to side effects. If you are pregnant, planning to become pregnant, or breastfeeding, discuss the potential benefits and risks to you and your baby with your doctor.
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Overdose Information

Overdose Symptoms:

  • Disorientation
  • Drowsiness
  • Impaired memory
  • Tachycardia
  • Sedation
  • Confusion
  • Mild to moderate CNS depression
  • Rarely, more severe effects like respiratory depression, coma, or cardiac arrhythmias (especially with co-ingestion of other drugs)

What to Do:

Seek immediate medical attention. Call 911 or Poison Control at 1-800-222-1222. Treatment is primarily supportive, including maintaining an open airway, monitoring cardiac and vital signs, and symptomatic treatment. Activated charcoal may be considered if ingested recently.

Drug Interactions

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Contraindicated Interactions

  • Monoamine Oxidase Inhibitors (MAOIs) (concurrent use or within 14 days of stopping MAOI or starting MAOI after mirtazapine)
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Major Interactions

  • Other serotonergic drugs (e.g., SSRIs, SNRIs, triptans, fentanyl, lithium, tramadol, St. John's Wort) - increased risk of serotonin syndrome.
  • CNS depressants (e.g., alcohol, benzodiazepines, opioids, sedatives, hypnotics) - additive CNS depression.
  • Drugs that prolong QT interval (e.g., some antiarrhythmics, antipsychotics, macrolide antibiotics) - theoretical risk of QT prolongation, though mirtazapine's effect is generally minimal.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole, erythromycin, cimetidine, protease inhibitors) - increased mirtazapine plasma concentrations.
  • Strong CYP3A4 inducers (e.g., carbamazepine, phenytoin, rifampin) - decreased mirtazapine plasma concentrations.
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Moderate Interactions

  • Warfarin - potential for increased INR (monitor INR).
  • Cimetidine - may increase mirtazapine levels.
  • Diazepam - no significant pharmacokinetic interaction, but additive CNS depression.
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Minor Interactions

  • Not available

Monitoring

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Baseline Monitoring

Depression severity (e.g., HAM-D, PHQ-9)

Rationale: To establish baseline and assess treatment efficacy.

Timing: Prior to initiation

Suicidal ideation/behavior

Rationale: Due to Black Box Warning, especially in young adults.

Timing: Prior to initiation

Complete Blood Count (CBC) with differential

Rationale: Rare risk of agranulocytosis/neutropenia. Baseline is important for comparison if symptoms develop.

Timing: Prior to initiation (consider, not routinely required unless risk factors)

Weight and BMI

Rationale: Mirtazapine is associated with weight gain and increased appetite.

Timing: Prior to initiation

Blood pressure and heart rate

Rationale: To assess for orthostatic hypotension (alpha1 antagonism).

Timing: Prior to initiation

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Routine Monitoring

Depression severity and clinical response

Frequency: Weekly for first 4-6 weeks, then monthly or as clinically indicated

Target: Reduction in symptom scores, improved mood and functioning

Action Threshold: Lack of improvement after adequate trial, worsening symptoms, or emergence of new symptoms.

Suicidal ideation/behavior

Frequency: Weekly for first 4 weeks, then every 2 weeks for next 4 weeks, then monthly for 3 months, then periodically

Target: Absence of suicidal thoughts or plans

Action Threshold: Any new or worsening suicidal ideation, especially in young adults; requires immediate assessment and intervention.

Weight and BMI

Frequency: Monthly for first 3-6 months, then every 3-6 months

Target: Stable weight or acceptable weight gain

Action Threshold: Significant or rapid weight gain (e.g., >5% of body weight); consider dietary counseling or alternative therapy.

Adverse effects (e.g., sedation, dizziness, dry mouth, constipation)

Frequency: At each visit, especially during titration

Target: Tolerable side effect profile

Action Threshold: Intolerable side effects; consider dose adjustment or discontinuation.

Signs of Serotonin Syndrome

Frequency: At each visit, especially if co-administered with other serotonergic drugs

Target: Absence of symptoms (agitation, hyperthermia, tremor, hyperreflexia, myoclonus)

Action Threshold: Any signs/symptoms; discontinue mirtazapine and provide supportive care.

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Symptom Monitoring

  • Worsening depression
  • Suicidal thoughts or behavior
  • Unusual changes in behavior or mood (e.g., agitation, irritability, anxiety, panic attacks, insomnia, impulsivity, hypomania, mania)
  • Signs of serotonin syndrome (e.g., agitation, hallucinations, rapid heart rate, fever, sweating, shivering, muscle stiffness or twitching, loss of coordination, nausea, vomiting, diarrhea)
  • Signs of agranulocytosis/neutropenia (e.g., sore throat, fever, flu-like symptoms, other signs of infection)
  • Allergic reactions (e.g., rash, hives, swelling)
  • Orthostatic hypotension (dizziness upon standing)
  • Excessive sedation or drowsiness
  • Significant weight gain or increased appetite

Special Patient Groups

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Pregnancy

Mirtazapine is Pregnancy Category C. Use during pregnancy should only be considered if the potential benefit justifies the potential risk to the fetus. Studies in animals have shown adverse effects, but there are no adequate and well-controlled studies in pregnant women. Neonates exposed to antidepressants in late third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding.

Trimester-Specific Risks:

First Trimester: Limited data, but generally not associated with major congenital malformations.
Second Trimester: Limited data.
Third Trimester: Potential for neonatal withdrawal symptoms (e.g., respiratory distress, feeding difficulties, irritability, tremor, hypotonia, persistent pulmonary hypertension of the newborn (PPHN)) if exposed late in pregnancy.
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Lactation

Mirtazapine is excreted into breast milk in small amounts. The American Academy of Pediatrics considers it compatible with breastfeeding. Monitor breastfed infants for sedation, poor feeding, and poor weight gain. Weigh the benefits of breastfeeding against the potential risks to the infant.

Infant Risk: Low to moderate risk. Monitor for drowsiness, irritability, poor feeding, and weight gain.
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Pediatric Use

Safety and efficacy have not been established in pediatric patients. Mirtazapine carries a Black Box Warning for increased risk of suicidal thoughts and behavior in children, adolescents, and young adults. Use is generally not recommended.

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Geriatric Use

Elderly patients may be more sensitive to the effects of mirtazapine, particularly sedation and orthostatic hypotension. A lower starting dose (e.g., 7.5 mg at bedtime) and slower titration are recommended. Monitor closely for adverse effects.

Clinical Information

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Clinical Pearls

  • Mirtazapine is often chosen for depression accompanied by insomnia, significant anxiety, or poor appetite/weight loss due to its sedating and appetite-stimulating effects.
  • Lower doses (e.g., 7.5-15 mg) tend to be more sedating due to prominent H1 antagonism, while higher doses (e.g., 30-45 mg) may be less sedating as noradrenergic effects become more prominent.
  • Weight gain is a common and significant side effect, which can be beneficial for underweight patients but problematic for others.
  • Unlike many other antidepressants, mirtazapine has minimal sexual side effects, making it a good option for patients experiencing or concerned about this issue.
  • It has a relatively low risk of serotonin syndrome compared to SSRIs/SNRIs when used alone, but the risk increases significantly with co-administration of other serotonergic agents.
  • Withdrawal symptoms can occur if discontinued abruptly, though generally less severe than with SSRIs/SNRIs. Tapering is recommended.
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Alternative Therapies

  • Selective Serotonin Reuptake Inhibitors (SSRIs) (e.g., fluoxetine, sertraline, escitalopram)
  • Serotonin-Norepinephrine Reuptake Inhibitors (SNRIs) (e.g., venlafaxine, duloxetine)
  • Tricyclic Antidepressants (TCAs) (e.g., amitriptyline, nortriptyline)
  • Atypical Antidepressants (e.g., bupropion, trazodone, vortioxetine, vilazodone)
  • Monoamine Oxidase Inhibitors (MAOIs) (e.g., phenelzine, tranylcypromine - reserved for refractory cases)
  • Electroconvulsive Therapy (ECT)
  • Transcranial Magnetic Stimulation (TMS)
  • Psychotherapy (e.g., Cognitive Behavioral Therapy - CBT)
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Cost & Coverage

Average Cost: $10 - $50 per 30 tablets (generic 15mg)
Generic Available: Yes
Insurance Coverage: Tier 1 or Tier 2 (for generic)
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General Drug Facts

If your symptoms or health issues persist or worsen, it is essential to contact your doctor promptly. To ensure safe use, never share your medication with others or take someone else's medication. This medication is accompanied by a Medication Guide, which provides crucial information. Please read this guide carefully and review it again whenever you receive a refill. If you have any questions or concerns about this medication, consult your doctor, pharmacist, or healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When reporting the incident, be prepared to provide details about the medication taken, the amount, and the time it occurred.