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All prescription medicines may cause side effects in some patients. If the patient has some side-effects such as upset stomach, nausea, sleepiness or tiredness, the doctor may ask him/her to take APO-ATOMOXETINE twice a day with meals, or in the evening. Most side effects will disappear after the first few weeks.
Weight loss may occur after starting APO-ATOMOXETINE, especially in the first few weeks. Growth rates (weight and height) after 3 years of treatment are near normal. It is not known if growth will be slowed in children who use atomoxetine for a longer period of time. The doctor will watch the weight and height. If the patient is not growing or gaining weight as expected, the doctor may change the treatment of atomoxetine.
APO-ATOMOXETINE can cause liver damage in rare cases. Call the doctor right away if presenting with dark urine, yellow skin/eyes, upper right-sided abdominal tenderness, or unexplained nausea, tiredness, itching or flu-like symptoms.
Stop taking APO-ATOMOXETINE and call the doctor right away if swelling or hives appear. Atomoxetine can cause a serious allergic reaction in rare cases.
New or Worsened Emotional or Behavioural Problems: A small number of patients taking drugs of this type may feel worse instead of better; for example, they may experience new or worsened feelings of agitation, hostility or anxiety, or thoughts about suicide. The doctor should be informed of such changes immediately. Close observation by a doctor is necessary in this situation. See also Precautions.
The following common side effects were reported in clinical trials with Atomoxetine: In teenagers and children over 6: upset stomach, decreased appetite, nausea or vomiting, dizziness, tiredness, constipation, low blood pressure.
In adults: constipation, dry mouth, nausea, decreased appetite, dizziness, problems sleeping, sexual side effects, problems urinating, menstrual cramps, rapid or irregular heartbeat, tiredness.
