lithium vs risperidone
Side-by-side comparison of lithium and risperidone. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
major Known Drug Interaction
Do not exceed twice the patient’s usual dose Enzyme (CYP3A) inhibitors Ranitidine 150 mg twice daily 1 mg single dose 1.2 1.4 Dose adjustment not needed Cimetidine 400 mg twice daily 1 mg single dose 1.1 1.3 Dose adjustment not needed Erythromycin 500 mg four times daily 1 mg single dose 1.1 0.94 Dose adjustment not needed Other Drugs Amitriptyline 50 mg twice daily 3 mg twice daily 1.2 1.1 Dose adjustment not Needed *Change relative to reference Effect of Risperidone on other drugs Lithium Repeated oral doses of risperidone tablets (3 mg twice daily) did not affect the exposure (AUC) or...
Recommendation: No dose changes are necessary for lithium when it is used at the same time as risperidone.
Lithobid, Eskalith
Risperdal
Lithium is a mood stabilizer medicine. It helps to balance mood swings.
Risperidone is a medicine used to treat certain mental disorders. It can help reduce symptoms like hallucinations, delusions, and aggression.
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.
Risperidone is used to treat schizophrenia in adults and teens. It also treats manic or mixed episodes of bipolar I disorder, either alone or with lithium or valproate. Additionally, it can help with irritability, including aggression and self-injury, in children and teens with autism.
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.
Risperidone works by changing the levels of certain natural substances in the brain. These substances are called neurotransmitters. By balancing these chemicals, risperidone can reduce symptoms of mental disorders.
- • Tremor (shaking)
- • Nausea
- • Increased weight
- • Fatigue (feeling tired)
- • Vomiting
- • Parkinsonism (slowed movement, stiffness)
- • Restlessness
- • Muscle stiffness or spasms
- • Tremors
- • Sleepiness
- Poisoning from different substances 2,179
- The drug is reacting with another medicine 1,526
- Shaking 1,463
- Feeling sick to your stomach 1,344
- Gaining weight 1,153
- Breast enlargement in males 24,608
- Unusual weight gain 9,446
- Weight gain 9,089
- Mental or emotional problem 5,947
- Harm or damage to the body 4,624
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.
Risperidone may increase the risk of death in elderly patients who have dementia-related psychosis. Risperidone is not approved for treating dementia-related psychosis.
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. Babies born to mothers who take risperidone in the last 3 months of pregnancy may have withdrawal symptoms or other problems after birth. There is a pregnancy registry to monitor outcomes in women exposed to risperidone during pregnancy. You can contact the registry at 1-866-961-2388.
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How to Read This lithium vs risperidone Comparison
lithium is classified in the Mood Stabilizer drug class, while risperidone sits within the Atypical Antipsychotic 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 7,665 submissions while risperidone has 53,714. 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 major interaction flagged in FDA labeling, attributed to taking risperidone does not change the amount of lithium that stays in your bloodstream or how your body handles it.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between lithium and risperidone - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.