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Brand name: Quelbree
Form of dosage: oral capsule, extended release (100 mg, 150 mg, 200 mg).
Drug class: Agonists that inhibit the uptake of adrenaline for ADHD

What is Viloxazine?

Viloxazine can be used to treat children aged 6–17 with attention deficit hyperactivity disorder (ADHD).This medication guide does not list all possible uses of Viloxazine.

Viloxazine side effects

If you experience any of the following symptoms of an allergic reaction, seek immediate medical attention: hives, difficulty breathing, swelling of your lips, face, tongue, or throat.

You should tell your doctor if any symptoms worsen or change, including changes in mood or behavior, anxiety, panic attacks, or trouble sleeping. Also, you may feel more impulsive, irritable, agitated, hostile, or aggressive.

If you experience any of the following symptoms, seek medical help immediately:

  • Race thoughts
  • Increased energy and decreased sleep need
  • Risk-taking behavior;
  • Being agitated or talkative.

Viloxazine may affect the weight of children. Inform your doctor if you notice that your child is losing weight or not gaining normal weight.

Viloxazine can cause a variety of side effects.

  • Drowsiness;
  • Feeling tired or irritable
  • Trouble sleeping
  • Vomiting and loss of appetite.

There may be other side effects. For medical advice on side effects, call your doctor. The FDA can be contacted at 1-800-FDA-1088 to report side effects.


Viloxazine can cause suicidal thoughts in some people. Be alert if you notice any changes in your mood or symptoms. Inform your doctor if you experience any new symptoms or if they worsen.

Before you take this drug

Viloxazine and some drugs are not compatible. You may need to change your treatment plan if you use:

  • Alosetron;
  • Duloxetine;
  • Ramelteon;
  • Tasimelteon;
  • Tizanidine;
  • Theophylline.

Viloxazine should not be used if MAO inhibitors have been taken in the last 14 days. It is possible that a dangerous drug interaction will occur. MAO inhibitors are isocarboxazid (linezolid), methylene blue injection, phenelzine, and tranylcypromine.

Inform your physician of any of the following issues:

  • Depression;
  • Bipolar disorder
  • Psychosis;
  • Suicidal thoughts and actions.

Tell your doctor about any of the following:

  • Heart problems
  • High blood pressure
  • Liver disease
  • Severe kidney disease

Viloxazine can be harmful if taken during pregnancy. Inform your doctor immediately if you become pregnant.You may find your name on a registry if you're pregnant. This is to monitor the effects of the drug viloxazine on the mother and baby.

Ask your doctor if you can safely breastfeed while taking this medication.No one under the age of 6 is allowed to use this product.

How to take viloxazine?

Read all the instructions or guides that come with your medication and follow the directions. Sometimes, your doctor will change the dose. You must take the medication exactly as prescribed.Viloxazine can be taken with or without food.

Do not open, crush, chew, or break the capsule.If you can't swallow the capsule in its entirety, mix it with applesauce. The mixture should be swallowed immediately without chewing.You will need to check your heart rate and blood pressure often.Store away from heat and moisture at room temperature.

Details on dosage

The usual pediatric dose for attention deficit disorder:

From 6 to 11 years:
Initial dose: 100mg orally, once per day.
You may titrate in 100 mg increments per week, depending on your response and tolerance.
Maximum dose: 400 mg/day
From 12 to 17 years:
Initial dose: 200 mg orally, once per day.
After 1 week, you may increase the dose to 400 mg once daily based on your response and tolerance.
Maximum dose: 400 mg/day
Assess your heart rate and blood pressure before initiating treatment.
Screen patients to determine if they have a history of depression, bipolar disorder, or suicide.
It may be necessary to continue the pharmacological treatment of attention-deficit/Hyperactivity disorder (ADHD) for a long time. Periodically reevaluate the dosage and adjust as necessary.
Use: To treat ADHD in children 6 years and older.

What happens if I miss the dose?

If you miss a dosage, call your doctor to get instructions.

What happens if I overdose?

Call 1-800-222-1222 for poison help or seek immediate medical attention.

What should be avoided?

Viloxazine can affect your reactions. Avoid driving and other hazardous activities until you are sure of how they will affect you. You may be unable to react.

Interaction with other drug

Viloxazine can be affected by other drugs, such as prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor of all the other medications you take.