Mirtazapine Oral: Uses, Side Effects, Dosages



Mirtazapine is a prescription medication that offers relief to people struggling with different mental health conditions. This versatile drug is available in two primary forms: 
  • As an oral immediate-release tablet under the brand name Remeron.
  • As an orally disintegrating tablet marketed as Remeron Soltab. 
  • Additionally, generic versions of Mirtazapine are available, often at a more affordable cost. Mirtazapine is prescribed as part of a combination therapy. That means it can be taken alongside other medications to enhance its effectiveness in treating specific mental health disorders.

    What is the Best Way to Use this Medicine?

    Forms and Strengths: Mirtazapine is available in various forms and strengths.
  • 1. Generic:
  • Oral immediate-release tablet: 7.5 mg, 15 mg, 30 mg, 45 mg
  • Orally disintegrating tablets: 15 mg, 30 mg, 45 mg
  • 2. Brand (Remeron):
  • Oral immediate-release tablets: 15 mg, 30 mg, 45 mg
  • 3. Brand (Remeron SolTab):
  • Orally disintegrating tablets: 15 mg, 30 mg, 45 mg
  • Dosage for Depression

  • 1. Adults (18-64 years):
  • Start with 15 mg once daily, usually in the evening.
  • The doctor adjusts the dosage based on your depression symptoms gradually.
  • Maximum daily dose: 45 mg once daily.
  • 2. Children (0-17 years):
  • Safety and efficacy in this age group are not confirmed.
  • 3. Seniors (65+ years):
  • Kidney function may decrease with age, affecting drug processing.
  • Doctors may start with a lower dose or a different schedule to prevent excessive drug buildup.
  • Remember, your dosage and form depend on factors like age, condition, and medical history. Always follow your doctor’s guidance for safe and effective use.

    Mirtazapine Side Effects: What to Know

    Drowsiness Warning: Mirtazapine may cause drowsiness, affecting your alertness, decision-making, and reaction time. Avoid activities like driving or using machinery until you understand how it affects you.

    Initial Restlessness: You may experience restlessness and agitation in the first few weeks.

    Common Side Effects:

  • Sleepiness
  • Increased appetite
  • Weight gain
  • Dry mouth
  • Constipation
  • Dizziness
  • Strange dreams

  • If these are mild, they might fade in a few days. Consult your doctor if they continue or worsen.

    Serious Side Effects

  • Suicidal Thoughts or Actions: If you have thoughts of self-harm, worsened depression, anxiety, or unusual changes in behavior, contact your doctor immediately.
  • Weakened Immune System: Look for signs like fever, sore throat, or flu-like symptoms, as Mirtazapine may decrease white blood cells.
  • Serotonin Syndrome: This is a life-threatening infection with signs like agitation, hallucinations, rapid heartbeat, and more.
  • Eye Problems: Check for eye pain, vision changes, or swelling/redness.
  • Seizures: Seek medical attention if you experience seizures.
  • Low Sodium Levels: Seniors are at higher risk; symptoms include headache and confusion.
  • Severe Skin Reactions: Be cautious of severe rashes, blisters, or ulcers on your skin or mouth.
  • Allergic Reactions: If you have trouble breathing, swelling of the face, or severe rashes, seek immediate help.
  • Increased Appetite or Weight: Monitor for unexpected weight gain.
  • High Cholesterol and Triglycerides: Regular monitoring may be necessary.
  • Rhabdomyolysis: Symptoms include muscle aches, pains, and kidney problems.
  • Stay alert for these side effects and consult your healthcare provider promptly if you experience severe or ongoing symptoms.

    Special Precautions for Mirtazapine Use

    Allergic Reaction Risk:

  • Symptoms: Trouble breathing, facial swelling, severe rash, blisters, ulcers, hives, fever, or joint pain.
  • Immediate medical attention is needed if symptoms occur.
  • Never retake Mirtazapine if you’ve had an allergic reaction
  • .

    Alcohol Interaction Warning:

  • Alcohol increases sleepiness risk.
  • Avoid alcohol or consult your doctor if you choose to drink.

    Warnings for Specific Health Conditions:

  • Mania or Bipolar Disorder: Discuss safety with your doctor, as Mirtazapine may trigger manic episodes.
  • Seizures: Consult your doctor if you have seizures; Mirtazapine could worsen the condition.
  • Heart Problems: Inform your doctor if you have angina, heart attack, or stroke history, as Mirtazapine may lower blood pressure and affect heart conditions.
  • Glaucoma or Eye Issues: Mention if you have glaucoma, as Mirtazapine can dilate pupils, potentially triggering glaucoma attacks.
  • Kidney Problems: People with kidney issues may not clear Mirtazapine efficiently, leading to increased side effects.
  • Liver Problems: Those with liver problems may not process the drug well, resulting in more side effects.

    Special Groups:

  • Pregnant Women: Mirtazapine is a category C pregnancy drug with potential risks to the fetus. Discuss with your doctor if you’re pregnant.
  • Breastfeeding Women: Mirtazapine may pass into breast milk, potentially affecting the child. Consult your doctor for guidance.
  • Seniors: Reduced kidney function in older adults may lead to slower drug processing, increasing the risk of side effects.
  • Children: The safety and effectiveness of Mirtazapine in those under 18 years old are unknown.
  •   Heed these warnings and consult your healthcare provider for personalized guidance based on your health and circumstances.

    Please Note: The above information is for knowledge purposes only. Please consult your healthcare provider for personalized medical advice.