Medication info
Olzapex Tablet 2.5 mg (Olanzapine)

Olzapex Tablet 2.5 mg (Olanzapine)

Prescription medicationTabletOral
Ingredient · strength
Olanzapine›2.5mg / 1 tablet
Manufacturer / importer
Korea Pharma Co., Ltd.
Appearance
White round film-coated tablet
Packaging
Bottle - 100 tablets/bottle, PTP - 30 tablets/PTP [10 tablets/PTP x 3]
Approval status
Active

MFDS item code 202501982 · Approved 2025.07.30 · Insurance code 653007160

Summary

Main use
Treatment and prevention of recurrence of bipolar disorder (e.g., manic and depressive episodes); treatment of schizophrenia
Who takes it
Adults
Adult dose
The therapeutic dose of this medicine should be adjusted according to the patient's clinical condition. Dose increases above the generally recommended daily dose of 10 mg are recommended only after an appropriate clinical evaluation. The recommended initial dose for schizophrenia is 5∼10 mg of olanzapine once daily. Maintenance treatment of schizophrenia: It is difficult to give a definitive answer as to how long treatment with this medicine should continue. However, its efficacy was demonstrated in a placebo-controlled study in patients with schizophrenia whose symptoms had stabilized after taking this medicine for approximately 8 weeks and who received maintenance treatment at a dose of 10∼20 mg daily for 8 months. The need for maintenance treatment at an appropriate dose should be evaluated periodically. Treatment of manic and mixed episodes associated with bipolar I disorder: The initial dose is 15 mg of this medicine once daily as monotherapy, or 10 mg once daily as adjunctive therapy with lithium or valproate. Prevention of recurrence in bipolar disorder: The recommended initial dose is 10 mg once daily. For patients who have received this medicine to treat mania, continue the same dose to prevent recurrence. If a new manic, mixed, or depressive episode occurs, treatment with this medicine should continue, with adjunctive therapy to treat mood symptoms as clinically indicated (optimizing the required dose). For the treatment of schizophrenia and manic and mixed episodes associated with bipolar I disorder, and for the prevention of recurrence in bipolar disorder, the daily dose may be adjusted within the range of 5 mg to 20 mg based on the clinical condition. Increases above the recommended initial dose are recommended only after an appropriate clinical evaluation and should generally be made at intervals of at least 24 hours. If treatment with this medicine is discontinued, the dose should be reduced gradually and cautiously. Acute treatment of depressive episodes associated with bipolar I disorder: Start treatment with 5 mg of olanzapine once daily, then increase to 10 mg once daily. Administer this medicine at bedtime and adjust the dose appropriately according to age and symptoms; do not exceed a daily dose of 20mg. This medicine may be taken with or without food, as food does not affect drug absorption. Elderly patients: Starting at a dose of 5 mg or less daily may be considered when there is sufficient evidence of clinical factors. Patients with renal or hepatic impairment: A low initial dose (5 mg) should be considered. In moderate hepatic impairment (cirrhosis, Child-Pugh class A or B), the initial dose is 5 mg and the dose should be increased cautiously. Patients with multiple factors that delay the metabolism of this medicine (female sex, advanced age, and nonsmoking status) may also be started at a low dose.

Ingredients

Manufacturer
Korea Pharma Co., Ltd.

Efficacy & effects

Treatment and prevention of recurrence of bipolar disorder (e.g., manic and depressive episodes); treatment of schizophrenia

  • Schizophrenia
  • mania
  • mixed episode
  • manic episode
  • depressive episode
View approved original text

This medication is used to treat various symptoms of schizophrenia and bipolar disorder. It alleviates symptoms in patients with schizophrenia, treats mania and mixed episodes associated with bipolar disorder I, prevents relapse in patients who have responded to treatment for manic episodes, and aids in the acute treatment of depressive episodes. This drug effectively supports the management and treatment of these mental health issues.

How to take

Adult dose

The therapeutic dose of this medicine should be adjusted according to the patient's clinical condition. Dose increases above the generally recommended daily dose of 10 mg are recommended only after an appropriate clinical evaluation. The recommended initial dose for schizophrenia is 5∼10 mg of olanzapine once daily. Maintenance treatment of schizophrenia: It is difficult to give a definitive answer as to how long treatment with this medicine should continue. However, its efficacy was demonstrated in a placebo-controlled study in patients with schizophrenia whose symptoms had stabilized after taking this medicine for approximately 8 weeks and who received maintenance treatment at a dose of 10∼20 mg daily for 8 months. The need for maintenance treatment at an appropriate dose should be evaluated periodically. Treatment of manic and mixed episodes associated with bipolar I disorder: The initial dose is 15 mg of this medicine once daily as monotherapy, or 10 mg once daily as adjunctive therapy with lithium or valproate. Prevention of recurrence in bipolar disorder: The recommended initial dose is 10 mg once daily. For patients who have received this medicine to treat mania, continue the same dose to prevent recurrence. If a new manic, mixed, or depressive episode occurs, treatment with this medicine should continue, with adjunctive therapy to treat mood symptoms as clinically indicated (optimizing the required dose). For the treatment of schizophrenia and manic and mixed episodes associated with bipolar I disorder, and for the prevention of recurrence in bipolar disorder, the daily dose may be adjusted within the range of 5 mg to 20 mg based on the clinical condition. Increases above the recommended initial dose are recommended only after an appropriate clinical evaluation and should generally be made at intervals of at least 24 hours. If treatment with this medicine is discontinued, the dose should be reduced gradually and cautiously. Acute treatment of depressive episodes associated with bipolar I disorder: Start treatment with 5 mg of olanzapine once daily, then increase to 10 mg once daily. Administer this medicine at bedtime and adjust the dose appropriately according to age and symptoms; do not exceed a daily dose of 20mg. This medicine may be taken with or without food, as food does not affect drug absorption. Elderly patients: Starting at a dose of 5 mg or less daily may be considered when there is sufficient evidence of clinical factors. Patients with renal or hepatic impairment: A low initial dose (5 mg) should be considered. In moderate hepatic impairment (cirrhosis, Child-Pugh class A or B), the initial dose is 5 mg and the dose should be increased cautiously. Patients with multiple factors that delay the metabolism of this medicine (female sex, advanced age, and nonsmoking status) may also be started at a low dose.

Precautions

This drug may cause a life-threatening serious side effect known as neuroleptic malignant syndrome, so if high fever, muscle rigidity, or changes in mental status occur, use should be immediately discontinued and a doctor's evaluation sought. It is not approved for the treatment of psychosis or behavioral disturbances related to dementia, and its use is not recommended, especially for elderly patients, due to increased mortality and risk of cerebrovascular disorders. Long-term use may lead to tardive dyskinesia, a movement disorder, so if any abnormal symptoms occur, dosage adjustments or discontinuation should be considered. It may take several days to weeks for effects to manifest at the beginning of treatment, requiring careful monitoring of patients. Diabetes or hyperglycemia may worsen, so blood sugar levels and weight should be regularly monitored, and immediate consultation with a physician is advised if there are any abnormal symptoms. Sudden discontinuation may cause symptoms such as sweating, insomnia, and nausea, so gradual tapering is recommended. Patients with cardiovascular diseases, elderly individuals, and those at risk of QT interval prolongation should use this medication cautiously and have their blood pressure and heart condition regularly monitored. Pregnant or breastfeeding women should consult with a physician before taking this medication, as it may affect the fetus or newborn. This medication can cause drowsiness and dizziness, so caution should be exercised when driving or operating hazardous machinery. Patients with certain liver diseases, a history of seizures, cardiovascular diseases, and low white blood cell counts require extra caution when using this medication. There may be interactions when this drug is taken with other medications, so it is essential to inform doctors or pharmacists of any other medications being taken. In case of overdose, there is no specific antidote, so prompt medical treatment is required, and symptoms such as hypotension or respiratory depression should be anticipated. This medication must be kept out of reach of children and stored away from light and moisture at 15-30 degrees Celsius.

Side effects

  • High fever
  • muscle rigidity
  • changes in mental state
  • irregular pulse
  • changes in blood pressure
  • tachycardia
  • sweating
  • arrhythmia
  • elevated creatine phosphokinase
  • myoglobinuria
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  • acute renal failure
  • increased mortality rate
  • cerebrovascular adverse reactions
  • stroke
  • transient ischemic attacks
  • tardive dyskinesia
  • drowsiness
  • weight gain
  • eosinophilia
  • increased prolactin
  • elevated cholesterol
  • increased blood sugar
  • elevated triglycerides
  • diabetes
  • increased appetite
  • inability to sit still
  • Parkinsonism
  • leukopenia
  • neutropenia
  • movement disorders
  • orthostatic hypotension
  • anticholinergic effects
  • elevated liver transaminases
  • rash
  • weakness
  • fatigue
  • fever
  • arthralgia
  • increased alkaline phosphatase
  • elevated gamma-glutamyl transferase
  • increased uric acid
  • elevated creatine phosphokinase
  • edema
  • elevated blood glucose
  • increased triglycerides
  • anemia
  • cyanosis
  • leukocytosis
  • lymphadenopathy
  • neutropenia
  • hypersensitivity reactions
  • acidosis
  • increased alkaline phosphatase
  • hyperbilirubinemia
  • dehydration
  • hypercholesterolemia
  • hyperglycemia
  • hyperlipidemia
  • hyperuricemia
  • hypoglycemia
  • hypokalemia
  • hyponatremia
  • lower extremity edema
  • upper extremity edema
  • hyperkalemia
  • ketosis
  • coma
  • gout
  • hypernatremia
  • hypoproteinemia
  • ketosis
  • water intoxication
  • hypothermia
  • dizziness
  • insomnia
  • depression
  • lightheadedness
  • Parkinsonism
  • movement disorders
  • tremors
  • muscle tension
  • speech difficulties
  • sensory disturbances
  • apathy
  • confusion
  • feelings of euphoria
  • coordination disorders
  • abnormal dreams
  • delusions
  • emotional instability
  • manic reactions
  • schizophrenia reactions
  • motor impairment
  • alcohol abuse
  • antisocial reactions
  • coordination impairment
  • CNS stimulation
  • cogwheel rigidity
  • incoherence
  • dementia
  • depersonalization
  • stuttering
  • facial paralysis
  • sensory loss
  • diminished movement
  • reduced muscle tone
  • decreased libido
  • increased libido
  • obsessive symptoms
  • phobias
  • somatization
  • stimulant abuse
  • confusion
  • tardive dyskinesia
  • dizziness
  • withdrawal syndrome
  • suicide attempts
  • amnesia
  • seizures
  • muscular rigidity
  • restless legs syndrome
  • periorbital paralysis
  • coma
  • encephalopathy
  • neuropathy
  • nystagmus
  • paralysis
  • subarachnoid hemorrhage
  • tobacco abuse
  • neuroleptic malignant syndrome
  • withdrawal symptoms
  • orthostatic hypotension
  • tachycardia
  • hypertension
  • hypotension
  • syncope
  • bradycardia
  • atrial fibrillation
  • congestive heart failure
  • cardiac arrest
  • hemorrhage
  • migraine
  • pallor
  • palpitations
  • vasodilation
  • premature ventricular contractions
  • QTc prolongation
  • thromboembolism
  • arteritis
  • heart failure
  • pulmonary embolism
  • ventricular fibrillation
  • sudden death
  • diabetes
  • diabetic acidosis
  • goiter
  • constipation
  • thirst
  • dyspepsia
  • vomiting
  • increased saliva secretion
  • dysphagia
  • esophagitis
  • fecal incontinence
  • gastritis
  • gastroenteritis
  • gingivitis
  • melena
  • oral ulcers
  • nausea
  • oral candidiasis
  • periodontal abscess
  • rectal bleeding
  • stomatitis
  • tongue swelling
  • dental caries
  • diarrhea
  • abdominal bloating
  • excessive saliva
  • rhinitis
  • increased cough
  • pharyngitis
  • dyspnea
  • apnea
  • asthma
  • epistaxis
  • hemoptysis
  • hyperventilation
  • hypoxemia
  • laryngitis
  • voice changes
  • atelectasis
  • hiccups
  • respiratory depression
  • pulmonary edema
  • wheezing
  • hepatic steatosis
  • hepatitis
  • jaundice
  • sweating
  • photosensitivity reactions
  • acne
  • dry skin
  • alopecia
  • contact dermatitis
  • eczema
  • papular rash
  • itching
  • seborrhea
  • skin discoloration
  • skin ulcers
  • urticaria
  • vesicular rash
  • hirsutism
  • pustular rash
  • drug reaction (DRESS)
  • low back pain
  • chest pain
  • tooth pain
  • influenza-like syndrome
  • injection site pain
  • abdominal enlargement
  • chills
  • facial edema
  • intentional injury
  • lethargy
  • candidiasis
  • throat pain
  • neck stiffness
  • pelvic pain
  • hangover
  • sudden death
  • joint stiffness
  • single contraction
  • arthritis
  • arthrosis
  • leg cramps
  • myasthenia
  • arthralgia
  • bone pain
  • bursitis
  • myopathy
  • osteoporosis
  • rheumatoid arthritis
  • rhabdomyolysis
  • amblyopia
  • visual disturbances
  • conjunctivitis
  • abnormal accommodation
  • blepharitis
  • cataracts
  • hearing loss
  • diplopia
  • dry eyes
  • ear pain
  • retinal hemorrhage
  • ocular inflammation
  • eye pain
  • abnormal eye muscle function
  • taste disturbances
  • tinnitus
  • corneal lesions
  • glaucoma
  • keratoconjunctivitis
  • decreased macular pigmentation
  • miosis
  • mydriasis
  • lenticular pigmentation
  • urinary incontinence
  • urinary tract infection
  • dysmenorrhea
  • vaginitis
  • abnormal ejaculation
  • amenorrhea
  • breast pain
  • cystitis
  • decreased menstrual flow
  • micturition disorders
  • galactorrhea
  • gynecomastia
  • hematuria
  • erectile dysfunction
  • increased menstrual flow
  • menorrhagia
  • uterine bleeding
  • polyuria
  • premenstrual syndrome
  • pyuria
  • frequency of urination
  • oliguria
  • anuria
  • uterine fibroid hypertrophy
  • vaginal bleeding
  • urinary retention
  • albuminuria
  • breast enlargement
  • mastitis
  • decreased urine output
  • male impotence
  • benign decreased libido
  • female amenorrhea
  • galactorrhea
  • breast enlargement
  • sustained erection
  • elevated plasma prolactin levels
  • elevated alkaline phosphatase
  • elevated creatine phosphokinase
  • elevated gamma-glutamyl transferase
  • increased uric acid
  • increased total bilirubin
  • neonatal withdrawal symptoms
  • tachycardia
  • excitement
  • aggression
  • stuttering
  • various extrapyramidal symptoms
  • decreased level of consciousness
  • incoherence
  • spasms
  • respiratory function suppression
  • aspiration
  • hypertension
  • hypotension
  • arrhythmia
  • cardiopulmonary arrest
  • ocular motor seizures
  • confusion
  • myotonic contractions
  • ocular motor nerve paralysis
  • headache
  • abdominal pain
  • dysesthesia
  • weight loss
  • bloody stools
  • spasms
  • hypomania
  • sexual discomfort
  • neuro-excitability
  • auditory hallucinations
  • liver failure
  • decreased appetite
  • urinary retention
  • pyelonephritis
  • ECG abnormalities
  • pupillary rigidity
  • torticollis
  • weight gain
  • drowsiness
  • increased appetite
  • sedation
  • hypersomnia
  • suicide attempts
  • anxiety
  • restlessness
  • excitement
  • panic attacks
  • irritability
  • hostility
  • aggression
  • impulsivity
  • restless leg syndrome
  • psychomotor agitation

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

Storage

This medication can be sensitive to air or moisture, so it should be stored in a tightly sealed container. It is recommended to maintain the storage temperature between 15 and 30 degrees Celsius to preserve the drug's effectiveness for an extended period.

Appearance and packaging

Appearance

White round film-coated tablet

Package unit

Bottle - 100 tablets/bottle, PTP - 30 tablets/PTP [10 tablets/PTP x 3]

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.

Questions about this medicine

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For anything that needs medical judgment, consult a doctor or pharmacist.

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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.