lithium vs mirtazapine
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Side-by-side comparison of lithium and mirtazapine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Examples SSRIs, SNRIs, triptans, tricyclic antidepressants, fentanyl, lithium, amphetamines, St.
Lithobid, Eskalith
Remeron
Lithium is a mood stabilizer medicine. It helps to balance mood swings.
Mirtazapine is a medicine used to treat depression in adults. It can help improve your mood and energy levels.
Lithium is used to treat bipolar disorder. Bipolar disorder causes unusual shifts in mood, energy, activity levels, and concentration. Lithium helps to control the extreme highs (mania) and lows (depression) of this condition.
Mirtazapine is used to treat major depressive disorder (MDD) in adults. This condition can cause you to feel sad, lose interest in activities, and have trouble with sleeping or eating. Mirtazapine can help improve these symptoms.
Lithium affects the flow of sodium in nerve and muscle cells in the body. This helps to stabilize your mood. It may also affect other chemical messenger systems in the brain.
Mirtazapine works by affecting certain chemicals in the brain called neurotransmitters. It helps to increase the levels of norepinephrine and serotonin. These chemicals can help improve mood and reduce symptoms of depression.
- • Tremor (shaking)
- • Nausea
- • Increased weight
- • Fatigue (feeling tired)
- • Vomiting
- • Feeling sleepy
- • Increased appetite
- • Weight gain
- • Dizziness
- Toxicity To Various Agents 2,179
- Drug Interaction 1,526
- Tremor 1,462
- Nausea 1,344
- Weight Increased 1,153
- Nausea 4,838
- Fatigue 4,715
- Fall 4,027
- Diarrhoea 3,961
- Toxicity To Various Agents 3,703
Lithium levels in your blood need to be monitored closely by your doctor. Too much lithium can be toxic and cause serious side effects. Make sure to attend all scheduled blood tests.
Antidepressants may increase the risk of suicidal thoughts and behaviors in young adults. Your doctor should closely watch you for worsening depression or suicidal thoughts. Mirtazapine is not approved for use in children.
Lithium can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. Lithium can pass into breast milk and may harm a nursing infant. Talk to your doctor about the best way to feed your baby if you are taking lithium.
Tell your doctor if you are pregnant or plan to become pregnant. Mirtazapine should be used during pregnancy only if clearly needed. Talk to your doctor if you are breastfeeding.
How to Read This lithium vs mirtazapine Comparison
lithium is classified in the Mood Stabilizer drug class, while mirtazapine sits within the Noradrenergic and Specific Serotonergic Antidepressant (NaSSA) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, lithium has 7,664 submissions while mirtazapine has 21,244. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to both of these medicines increase a brain chemical called serotonin, and taking them together can cause levels to become too high.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for lithium or mirtazapine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.