atomoxetine vs warfarin
Side-by-side comparison of atomoxetine and warfarin. 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
Atomoxetine did not affect the binding of warfarin, acetylsalicylic acid, phenytoin, or diazepam to human albumin.
Recommendation: No dosage adjustments are typically required for this combination.
Strattera
Coumadin, Jantoven
Atomoxetine (Strattera) is a medicine that can help people with Attention-Deficit/Hyperactivity Disorder (ADHD). It works by affecting a chemical in the brain called norepinephrine.
Warfarin is a medicine that helps prevent blood clots. It is used to treat and prevent dangerous clots from forming in your body.
Atomoxetine is used to treat Attention-Deficit/Hyperactivity Disorder (ADHD). ADHD can cause you to be hyperactive, impulsive, and have trouble paying attention. This medicine can help you focus, be less impulsive, and feel calmer. It is for both kids and adults.
Warfarin is used to prevent and treat blood clots in your veins and lungs. It can also prevent clots if you have atrial fibrillation (irregular heartbeat) or a replacement heart valve. After a heart attack, it can lower the risk of death, another heart attack, or a stroke.
Atomoxetine works by increasing the amount of norepinephrine in your brain. Norepinephrine is a chemical that helps you pay attention and control your impulses. By increasing norepinephrine, atomoxetine can improve ADHD symptoms.
Warfarin works by blocking your body's use of vitamin K. Vitamin K is needed to make blood clotting factors. By blocking vitamin K, warfarin makes your blood less likely to clot.
- • Feeling sick to your stomach
- • Throwing up
- • Feeling tired
- • Not feeling hungry
- • Belly pain
- • Bleeding from any tissue or organ
- Feeling sick to your stomach 431
- Head pain 407
- Feeling tired 401
- The health problem got worse 395
- High blood pressure 388
- INR increased 10,275
- Shortness of breath 8,408
- Interaction with another medicine 6,289
- Tiredness 6,141
- Feeling sick to your stomach 5,921
Atomoxetine can increase the risk of suicidal thoughts in children and teenagers. Watch carefully for worsening mood or any unusual changes in behavior. Tell your doctor right away if you have any suicidal thoughts or feelings.
Warfarin can cause major or fatal bleeding. You must have your blood tested regularly (INR) while taking warfarin. Many things, like other medicines and diet changes, can affect your INR. Tell your doctor about any bleeding and follow their instructions to prevent bleeding.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if atomoxetine will harm your unborn baby. There is a pregnancy registry for women who take ADHD medicines during pregnancy. Talk to your doctor about how to register.
Warfarin can harm your unborn baby, especially during the first three months of pregnancy. Do not take warfarin if you are pregnant, unless you have a mechanical heart valve and your doctor says the benefits outweigh the risks. Talk to your doctor if you are breastfeeding, and watch your baby for bruising or bleeding.
How to Read This atomoxetine vs warfarin Comparison
atomoxetine is classified in the Selective Norepinephrine Reuptake Inhibitor drug class, while warfarin sits within the Vitamin K Antagonist (Anticoagulant) 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, atomoxetine has 2,022 submissions while warfarin has 37,034. 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 atomoxetine does not interfere with how warfarin attaches to proteins in the blood, so it should not change how well the blood thinner works.. 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 atomoxetine and warfarin - 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.