Medication info
Hwanin Atomoxetine Tablet 40mg (Atomoxetine Hydrochloride)

Hwanin Atomoxetine Tablet 40mg (Atomoxetine Hydrochloride)

Prescription medicationTabletOral
Ingredient · strength
Atomoxetine Hydrochloride›45.71mg / 1 tablet
Manufacturer / importer
Hwanin Pharmaceutical Co., Ltd.
Appearance
White oval film-coated tablet
Packaging
30 tablets/bottle, 100 tablets/bottle
Approval status
Active

MFDS item code 202600050 · Approved 2026.01.07

Summary

Main use
Treatment of attention-deficit/hyperactivity disorder (ADHD) in children aged 6 years and older and adults
Who takes it
Adults · Children
Adult dose
This medicine may be administered orally once daily in the morning, with or without food. Patients who do not achieve a satisfactory clinical response (tolerability or efficacy) with once-daily administration may take the same dose in two divided doses, in the morning and late afternoon or early evening. Dosage for adults Start this medicine at a total daily dose of approximately 40mg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is 80mg. For patients who do not show an adequate response, the dose may be increased to a maximum of 100 mg after 2∼4 weeks. There is no evidence that higher doses provide greater efficacy. For patients with moderate hepatic impairment (Child-Pugh Class B), reduce both the initial and target doses to 50% of the usual dose. For patients with severe hepatic impairment (Child-Pugh Class C), reduce both the initial and target doses to 25% of the usual dose. Although patients with end-stage renal disease have greater systemic exposure to this medicine than healthy subjects (approximately 65% higher), there is no difference when exposure is adjusted for mg/kg dose. Therefore, this medicine may be administered at the usual dosage to patients with ADHD who have end-stage renal disease or mild renal impairment. This medicine may worsen hypertension in patients with end-stage renal disease. Elderly patients: Not applicable. In placebo-controlled studies, there is no useful evidence indicating how long patients with ADHD should be treated with this medicine. However, it is generally agreed that pharmacological treatment of ADHD should be continued for an extended period. Nevertheless, physicians who decide to use this medicine for an extended period should periodically reassess the long-term usefulness of the medicine for each patient. This medicine may be taken on an empty stomach or with food. The safety of single doses exceeding 120mg and total daily doses exceeding 150mg has not been systematically evaluated. For adults receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine), start this medicine at 40mg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 80mg/day. This medicine may be discontinued without dose reduction.
Child dose
Children weighing up to 70 kg: Start this medicine at a total daily dose of approximately 0.5 mg/kg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is approximately 1.2mg/kg/day. (Depending on the patient's weight and the strength of this medicine used) No additional benefit has been demonstrated at doses above 1.2 mg/kg/day. The total daily dose in children should not exceed 1.4mg/kg or 100mg. Children weighing more than 70 kg: Start this medicine at a total daily dose of approximately 40mg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is 80mg. For patients who do not show an adequate response, the dose may be increased to a maximum of 100 mg after 2∼4 weeks. There is no evidence that higher doses provide greater efficacy. Children under 6 years of age: The safety and efficacy of this medicine have not been established. Therefore, this medicine should not be used in children under 6 years of age. Children weighing up to 70 kg who are receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine): Start this medicine at 0.5mg/kg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 1.2mg/kg/day. Children weighing 70 kg or more who are receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine): Start this medicine at 40mg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 80mg/day.

Ingredients

Manufacturer
Hwanin Pharmaceutical Co., Ltd.

Efficacy & effects

Treatment of attention-deficit/hyperactivity disorder (ADHD) in children aged 6 years and older and adults

  • Attention deficit
  • hyperactivity disorder
View approved original text

This medication is used to treat Attention Deficit Hyperactivity Disorder (ADHD) in children aged 6 years and older and adults. Diagnosis should be made according to DSM-IV criteria or ICD-10 guidelines and should be administered as part of a comprehensive treatment program. It helps improve the patients' attention and behavior control abilities to aid their adaptation to daily life.

How to take

Adult dose

This medicine may be administered orally once daily in the morning, with or without food. Patients who do not achieve a satisfactory clinical response (tolerability or efficacy) with once-daily administration may take the same dose in two divided doses, in the morning and late afternoon or early evening. Dosage for adults Start this medicine at a total daily dose of approximately 40mg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is 80mg. For patients who do not show an adequate response, the dose may be increased to a maximum of 100 mg after 2∼4 weeks. There is no evidence that higher doses provide greater efficacy. For patients with moderate hepatic impairment (Child-Pugh Class B), reduce both the initial and target doses to 50% of the usual dose. For patients with severe hepatic impairment (Child-Pugh Class C), reduce both the initial and target doses to 25% of the usual dose. Although patients with end-stage renal disease have greater systemic exposure to this medicine than healthy subjects (approximately 65% higher), there is no difference when exposure is adjusted for mg/kg dose. Therefore, this medicine may be administered at the usual dosage to patients with ADHD who have end-stage renal disease or mild renal impairment. This medicine may worsen hypertension in patients with end-stage renal disease. Elderly patients: Not applicable. In placebo-controlled studies, there is no useful evidence indicating how long patients with ADHD should be treated with this medicine. However, it is generally agreed that pharmacological treatment of ADHD should be continued for an extended period. Nevertheless, physicians who decide to use this medicine for an extended period should periodically reassess the long-term usefulness of the medicine for each patient. This medicine may be taken on an empty stomach or with food. The safety of single doses exceeding 120mg and total daily doses exceeding 150mg has not been systematically evaluated. For adults receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine), start this medicine at 40mg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 80mg/day. This medicine may be discontinued without dose reduction.

Child dose

Children weighing up to 70 kg: Start this medicine at a total daily dose of approximately 0.5 mg/kg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is approximately 1.2mg/kg/day. (Depending on the patient's weight and the strength of this medicine used) No additional benefit has been demonstrated at doses above 1.2 mg/kg/day. The total daily dose in children should not exceed 1.4mg/kg or 100mg. Children weighing more than 70 kg: Start this medicine at a total daily dose of approximately 40mg. Maintain the initial dose for at least 7 days before gradually increasing it according to clinical response and tolerability. The recommended maintenance dose is 80mg. For patients who do not show an adequate response, the dose may be increased to a maximum of 100 mg after 2∼4 weeks. There is no evidence that higher doses provide greater efficacy. Children under 6 years of age: The safety and efficacy of this medicine have not been established. Therefore, this medicine should not be used in children under 6 years of age. Children weighing up to 70 kg who are receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine): Start this medicine at 0.5mg/kg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 1.2mg/kg/day. Children weighing 70 kg or more who are receiving strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine, and quinidine): Start this medicine at 40mg/day. If symptoms have not improved after 4 weeks and the initial dose is well tolerated, increase to the target dose of 80mg/day.

Precautions

This medication is used to treat Attention Deficit Hyperactivity Disorder (ADHD). While taking this medication, behaviors associated with suicidality may occur, so especially pediatric patients should be closely monitored for behavioral changes such as suicidal thoughts or attempts. Aggressive behavior or increased hostility, as well as emotional instability, may also occur, so if these symptoms develop, it is important to consult healthcare professionals immediately. There is a risk of serious liver damage, so this medication should not be used in patients with poor liver function or jaundice, and should be discontinued immediately if abnormal symptoms appear. This medication may pose risks when combined with certain drugs, so especially patients with MAO inhibitors or cardiovascular diseases should consult a doctor before using it. Patients with allergies, sudden heart abnormalities, or a history of seizures should also use this medication with caution. The safety and efficacy of this medication have not been established in children under 6 years of age, so it is best not to use it. During treatment, weight loss, loss of appetite, drowsiness, headache, nausea, constipation, and other side effects may occur, and if these symptoms are severe or persistent, patients should inform their healthcare provider. There may be drowsiness or dizziness when driving or operating machinery, so caution is advised. During pregnancy or breastfeeding, the use of this medication is not recommended, and it is important to consult with a physician before administration. This medication may affect growth and development when taken for a long period, so especially in children, regular monitoring of growth status is necessary. Lastly, it is important to routinely measure heart rate and blood pressure during treatment to ensure that there are no abnormalities.

Side effects

  • Suicidal attempt
  • suicidal ideation
  • aggression
  • oppositional behavior
  • anger
  • emotional instability
  • liver damage
  • increased liver enzymes
  • jaundice
  • itching
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  • drowsiness
  • irritability
  • nausea
  • vomiting
  • abdominal pain
  • constipation
  • fatigue
  • abnormal sensations
  • headache
  • seizures
  • dyspepsia
  • appetite decrease
  • dizziness
  • rash
  • insomnia
  • mood disturbances
  • blurred vision
  • dry mouth
  • nervousness
  • tremors
  • sleep disturbances
  • urinary retention
  • difficulty urinating
  • erectile dysfunction
  • dysmenorrhea
  • hyperhidrosis
  • facial flushing
  • peripheral coldness
  • tachycardia
  • testicular pain
  • agitation
  • restlessness
  • urinary urgency
  • frequency of urination
  • pruritus
  • urticaria
  • somnolence
  • sensory impairment
  • paresthesia
  • tics
  • depression
  • anxiety
  • psychosis
  • agitation
  • suicide-related events
  • aggression
  • hostility
  • emotional instability
  • male pelvic pain
  • urinary obstruction
  • urinary retention
  • priapism
  • male genital pain
  • abnormal liver function tests
  • hepatitis
  • syncope
  • Raynaud's phenomenon
  • QT prolongation
  • chills
  • thirst
  • nasopharyngitis
  • nightmares
  • sore throat
  • pneumonia
  • psychomotor hyperactivity
  • traffic accidents
  • sinusitis
  • sleep disorders
  • tics
  • upper respiratory tract infections
  • chickenpox
  • weight loss
  • reduced appetite
  • anxiety
  • appendicitis
  • asthma
  • chest discomfort
  • conjunctivitis
  • loss of interest
  • delayed sleep phase
  • stuttering
  • emotional disturbance
  • nocturnal enuresis
  • belching
  • fatigue
  • increased appetite
  • irritability
  • arthritis sprain
  • nausea
  • nightmares
  • orthostatic hypotension
  • sore throat
  • pneumonia
  • urticaria
  • psychomotor hyperactivity
  • sedation
  • sinusitis
  • sleep disorders
  • drowsiness
  • tremors
  • upper respiratory tract infections
  • chickenpox
  • vomiting
  • insomnia
  • anxiety
  • insomnia
  • sleeplessness
  • early insomnia
  • middle insomnia
  • late insomnia

Not everyone experiences these, and they can vary from person to person.

Storage

This medication should be stored in a tightly closed container to prevent air or moisture from entering. Additionally, it should be kept in a cool place at room temperature, ideally below 25 degrees Celsius, to maintain its effectiveness.

Appearance and packaging

Appearance

White oval film-coated tablet

Package unit

30 tablets/bottle, 100 tablets/bottle

Same-ingredient medicines

Even with the same ingredient, strength, dosage form and how it is taken can differ.

Even with the same ingredient, the dose and directions can differ by strength and dosage form. Talk to a doctor or pharmacist before switching from a medication you are already taking.

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This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.