October 24, 2014
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Drug Factsheets

 Health Home >> Medications 

Strattera

(atomoxetine)

DIN (Drug Identification Number)

02262800 STRATTERA 10MG CAPSULE
02262819 STRATTERA 18MG CAPSULE
02262827 STRATTERA 25MG CAPSULE
02262835 STRATTERA 40MG CAPSULE
02262843 STRATTERA 60MG CAPSULE
02279347 STRATTERA 80MG CAPSULE
02279355 STRATTERA 100MG CAPSULE

What side effects are possible with Strattera?

Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent. The side effects listed below are not experienced by everyone who takes this medication. If you are concerned about side effects, discuss the risks and benefits of this medication with your doctor.

The following side effects have been reported by at least 1% of people taking this medication. Many of these side effects can be managed, and some may go away on their own over time.

Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.

  • constipation
  • decreased appetite
  • difficulty urinating
  • dizziness
  • erectile dysfunction (trouble getting or keeping an erection) or reduced sex drive
  • fainting or feeling lightheaded after getting up from a sitting or lying position
  • fatigue
  • nausea
  • painful menstruation (periods)
  • sleepiness
  • trouble sleeping
  • upset stomach
  • vomiting
  • weight loss

Although most of the side effects listed below don't happen very often, they could lead to serious problems if you do not check with your doctor or seek medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

  • agitation
  • aggressive behaviour
  • increased blood pressure
  • palpitations (feeling your heart beat quickly or irregularly)
  • problems with urination
  • signs of depression (e.g., poor concentration, changes in weight, changes in sleep, decreased interest in activities, thoughts of suicide)
  • symptoms of liver damage (e.g., yellow skin or eyes, abdominal pain, loss of appetite, pale stools, dark urine)

Stop taking the medication and seek immediate medical attention if any of the following occur:

  • an erection lasting longer than 4 hours
  • symptoms of a serious allergic reaction (e.g., hives, swelling of the face and throat, difficulty breathing)
  • thoughts of suicide or hurting yourself

Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking this medication.





Are there any other precautions or warnings for Strattera?

Before you begin taking a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should take this medication.

Behavioural and emotional changes: Atomoxetine may cause some people to experience unusual feelings of aggression, hostility, or anxiety. They may have hallucinations or have impulsive or disturbing thoughts of harming themselves. If you experience these side effects (or notice them in a family member who is taking this medication), contact your doctor immediately. Your doctor will monitor you closely for these side effects while you are taking this medication.

Blood pressure: People with low blood pressure or high blood pressure should be closely monitored by their doctor while they are taking this medication. This medication can increase blood pressure or can cause dizziness or fainting for people who have low blood pressure. If you have low blood pressure or high blood pressure, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Drowsiness/reduced alertness: Atomoxetine may affect the mental or physical abilities needed to drive or operate machinery. Avoid driving, operating machinery, or performing other hazardous tasks until you have determined how this medication affects you.

Exercise: If you participate in strenuous exercise or activities, consult your doctor before taking atomoxetine.

Growth and weight gain: This medication can cause children to lose weight and can slow their growth rate. Your doctor will monitor for slowed growth while they are taking this medication. Children who are not growing or gaining weight as expected may need to stop their treatment with this medication, as recommended by their doctor.

Heart problems: This medication can increase heart rate and blood pressure. It may also increase the risk of sudden death for people with heart problems. If you have heart problems, including an irregular heartbeat or a family history of sudden death related to heart disease, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed. Atomoxetine is generally not recommended for people with known structural heart abnormalities (such as abnormal size, missing or poorly functioning heart valves, or problems with blood vessels connected to the heart).

Kidney function: Kidney disease or reduced kidney function may cause this medication to build up in the body, causing side effects. People with kidney problems may need lower doses of this medication. People with kidney problems should discuss with their doctor how this medication may affect their medical conditions, how their medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Liver function: Liver disease or reduced liver function may cause this medication to build up in the body, causing side effects. People with decreased liver function may require lower doses of this medication. In rare cases, atomoxetine may cause liver injury. Anyone taking atomoxetine should report yellow eyes or skin, dark urine, itching, upper-right abdominal pain, or unexplained flu-like symptoms to their doctor.

Long-term use: If you use this medication for a long period of time, you will need regular heart checkups by your doctor.

Stopping the medication: Check with your doctor before stopping this medication.

Pregnancy: This medication should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately.

Breast-feeding: It is not known if atomoxetine passes into breast milk. If you are a breast-feeding mother and are taking this medication, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of this medication have not been established for young children. Atomoxetine should not be used by children under 6 years of age.

What other drugs could interact with Strattera?

There may be an interaction between atomoxetine and any of the following:

  • abiraterone
  • alcohol
  • amiodarone
  • antipsychotics (e.g., aripiprazole, chlorpromazine, clozapine, haloperidol, thioridazine)
  • blood pressure medications
  • ß-agonists (e.g., fenoterol, formoterol, salbutamol, salmeterol)
  • bupropion
  • caffeine
  • celecoxib
  • chloroquine
  • clobazam
  • darunavir
  • delaviridine
  • diphenhydramine
  • dipivefrin
  • dronedarone
  • imatinib
  • isoniazid
  • ketoconazole
  • linezolid
  • lopinavir
  • methadone
  • modafinil
  • monoamine oxidase inhibitors (MAOI; e.g., phenelzine, tranylcypromine, moclobemide)
  • nilotinib
  • other medications for ADHD (e.g., dextroamphetamine, methylphenidate)
  • oxymetazoline
  • peginterferon alfa-2b
  • pimozide
  • quinidine
  • quinine
  • rasagiline
  • ritonavir
  • selegiline
  • serotonin reuptake inhibitors (e.g., fluoxetine, paroxetine, sertraline)
  • stiripentol
  • sympathomimetic medications (e.g., dobutamine, dopamine, epinephrine, pseudoephedrine)
  • theophylline
  • ticlopidine
  • tricyclic antidepressasnts (e.g., amitriptyline, clomipramine, desipramine, trimipramine)
  • xylometazoline

If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:

  • stop taking one of the medications,
  • change one of the medications to another,
  • change how you are taking one or both of the medications, or
  • leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with this medication. Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications you are taking. Also tell them about any supplements you take. Since caffeine, alcohol, the nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.

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