A small number of people (especially children/teenagers) who take atomoxetine for attention-deficit hyperactivity disorder (ADHD) may experience worsening of their condition, other mental/mood symptoms, or suicidal thoughts/attempts. Therefore, it is very important to talk with the doctor about the risks and benefits of this medication (especially for children/teenagers).
Tell the doctor immediately if you notice worsening of your condition/other psychiatric conditions, unusual behavior changes (including possible suicidal thoughts/attempts), or other mental/mood changes (including new/worsening anxiety, panic attacks, trouble sleeping, irritability, hostile/angry feelings, hallucinations, delusions, impulsive actions, severe restlessness, very rapid speech). Be especially watchful for these symptoms when you first start this medication or when the dose is changed.Who should not take atomoxetine?
Atomoxetine is used to treat attention-deficit hyperactivity disorder (ADHD) as part of a total treatment plan, including psychological, social, and other treatments. It may help to increase the ability to pay attention, concentrate, stay focused, and stop fidgeting. It is thought to work by restoring the balance of certain natural substances (neurotransmitters) in the brain.
Read the Medication Guide provided by your pharmacist before you start using atomoxetine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication with or without food as directed by your doctor, usually 1 to 2 times a day. The first dose is usually taken when you wake up in the morning. If a second dose is prescribed, take it as directed by your doctor, usually in the late afternoon/early evening. Taking this medication late in the day may cause trouble sleeping (insomnia).
Swallow the capsules whole. Do not crush, chew, or open the capsules. If the capsule is accidentally opened or broken, avoid contact with the powder and wash away any loose powder as soon as possible with water. If the powder gets in your eyes, flush with plenty of water right away and contact your doctor.
The dosage is based on your medical condition, response to treatment, and other drugs you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Do not increase your dose or take this drug more often than directed.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.
Tell your doctor if your condition does not improve or if it worsens.
See also Warning section.
Stomach upset, nausea, vomiting, constipation, tiredness, loss of appetite/weight loss, dry mouth, dizziness, drowsiness, trouble sleeping, or decrease in sexual ability/desire may occur. In women, menstrual cramps or missed/irregular periods may also occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
To lessen the chance of dizziness, get up slowly from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Atomoxetine may rarely cause serious (possibly fatal) liver disease. Get medical help right away if you have any symptoms of liver damage, including: dark urine, persistent nausea/vomiting/loss of appetite, stomach/abdominal pain, yellowing eyes/skin.
This medication may rarely cause serious problems such as a heart attack or stroke. Get medical help right away if you experience any of the following: chest/jaw/left arm pain, shortness of breath, unusual sweating, weakness on one side of the body, confusion, slurred speech, sudden vision changes.
Rarely, males (including young boys and teens) may have a painful or prolonged erection lasting 4 or more hours while using this medication. Caregivers/parents should also be watchful for this serious side effect in boys. If a painful or prolonged erection occurs, stop using this drug and get medical help right away, or permanent problems could occur. Ask your doctor or pharmacist for more details.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking atomoxetine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: a certain adrenal problem (pheochromocytoma), bladder or prostate problems, glaucoma, heart problems (such as irregular heartbeat, heart failure, previous heart attack, problems with heart structure), family history of heart problems (such as sudden cardiac death, irregular heartbeat), high blood pressure, liver disease, personal/family history of mental/mood disorders (such as bipolar disorder, depression, psychosis, suicidal thoughts), stroke.
This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
If used for a long time, this drug may affect a child's growth rate, weight, and final adult height. To reduce the risk, the doctor may recommend briefly stopping the medication from time to time. Check the child's weight and height regularly, and consult your doctor or pharmacist for more details.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Taking MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before and after treatment with this medication. Ask your doctor when to start or stop taking this medication.
Check the labels on all your medicines (such as cough-and-cold products, diet aids) because they may contain ingredients that could increase your heart rate or blood pressure. Ask your pharmacist for more details.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: unusually fast heartbeat, severe headache.
Do not share this medication with others.
Laboratory and/or medical tests (such as pulse, blood pressure, liver function tests) may be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
If you have heart problems, your doctor may perform certain heart tests (EKG, echocardiogram) before you start this medication.
Keep all regular medical and laboratory appointments.
If you miss a dose, take it as soon as you remember if it is the same day. If it is the next day, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised December 2013. Copyright(c) 2013 First Databank, Inc.
With WebMD's Medicine Cabinet, you can check interactions with drugs.Go to medicine cabinet