Q: What precautions should be taken when using Topiramate 25 mg (Topiramate)?

This medication may increase the risk of suicidal ideation or behavior, so if mood changes or unusual behavior occurs during treatment, it is essential to inform healthcare professionals immediately. While taking this medication, severe skin reactions, such as sudden rashes, blisters, or mucosal damage may occur, so if such symptoms appear, stop taking the medication immediately and visit a hospital. Taking this medication during pregnancy may pose risks of birth defects or growth disorders to the fetus, so women of childbearing potential should take a pregnancy test before use and ensure effective contraception is in place. This medication may accumulate in patients with decreased renal function, so dosage adjustments should be made based on renal function, and patients undergoing dialysis may require dosage adjustment based on dialysis conditions. This medication may affect the central nervous system and cause symptoms such as drowsiness, dizziness, and blurred vision; caution is necessary when driving or operating machinery. Adequate hydration is essential during treatment, and if there are symptoms related to kidney stones or kidney issues, healthcare professionals should be consulted immediately. Abrupt discontinuation of this medication may lead to seizures or worsening of conditions; therefore, dosage should be gradually reduced when stopping treatment. There may be interactions with other medications, so it is crucial to inform healthcare professionals of any concurrent medications, especially contraceptives, certain anticonvulsants, lithium, and antidiabetic medications.

Question 1

What are the indications and effects of Topiramate 25 mg (Topiramate)?

Accepted Answer

This medication is used for the treatment of epilepsy. It is used as monotherapy for partial seizures and secondary generalized seizures in children over 6 years old and adults, and as adjunctive therapy for patients aged 2 years and older whose seizures are not controlled by existing medications. It is also effective for seizures related to Lennox-Gastaut syndrome and for the treatment of primary generalized tonic-clonic seizures. Additionally, it is used to prevent migraines. Overall, it is a drug that helps with epilepsy and migraine prevention.

Question 2

What are the dosage and administration instructions for Topiramate 25 mg (Topiramate)?

Accepted Answer

It is advisable to start this medicine at a low dose and gradually increase it to the effective dose.
Monitoring plasma concentrations is not necessary to optimize the dosage of this medicine.
The recommended dosage of this medicine applies to all adults and children, including the elderly, provided they do not have renal disease.
This medicine may be taken with or without food.
Swallow the tablets whole; do not crush them.

1. Epilepsy
1) Monotherapy: When discontinuing other concomitant antiepileptic drugs in order to administer topiramate as monotherapy, consider the potential effect on seizure control. Unless other antiepileptic drugs must be discontinued immediately for safety reasons, gradually reduce their dosage by approximately 1/3 every 2 weeks until discontinuation (see “5. General Precautions” under Precautions for Use).
When drugs that induce drug-metabolizing enzymes are discontinued, topiramate concentrations may increase. If a clinically significant increase in topiramate concentrations occurs, the dose of this medicine may need to be reduced.
Adults (17 years and older):
Start with 25㎎ in the evening during the first week. Thereafter, increase the total daily dose by 25 or 50㎎ at intervals of 1-2 weeks and administer in 2 divided doses. If the patient has difficulty tolerating this rate of increase, extend the interval between increases. The dose and rate of increase should be determined according to clinical response. The recommended dose for adult monotherapy is 100～200mg daily. The maximum recommended dose is 500㎎ daily. Some patients with recurrent epilepsy have tolerated up to 1,000㎎ daily of topiramate monotherapy.
2) Adjunctive therapy
Adults (17 years and older)
The minimum effective dose is 200mg daily, and the usual dose is 200-400mg daily in 2 divided doses. Depending on the patient, the dose may be increased to the maximum recommended dose of 800mg daily. Begin treatment with 25-50mg in the evening during the first week; starting at a lower dose is also possible. Thereafter, increase the dose by 25-50mg at intervals of 1-2 weeks and administer in 2 divided doses. If the patient has difficulty tolerating the increased dose, smaller increments may be used or the interval between increases may be extended. The dose should be determined according to clinical effect.

2. Prevention of migraine
Adults: Begin with 25mg of this medicine in the evening during the first week. Thereafter, increase the daily dose by 25mg at weekly intervals. If the patient has difficulty tolerating these increases, extend the interval between increases. The recommended dose is 100mg daily, administered in 2 divided doses. Some patients may respond to a dose of 50mg daily. Doses of up to 200mg daily may be administered; the dose and rate of increase should be determined according to clinical response.

3. Patients with renal impairment
- For patients with moderate or severe renal impairment (CLcr < 70 mL/min/1.73 m2), it is recommended that the initial and maintenance doses be reduced to approximately 1/2.
- Patients receiving hemodialysis: Because this medicine is removed from plasma by hemodialysis, increase the dose by approximately 1/2 on dialysis days. Adjust the dose taking into account the duration of dialysis, the clearance of the dialysis equipment, and the patient's renal clearance, and administer in divided doses at the start and end of hemodialysis.

4. Patients with hepatic impairment
Use with caution in patients with hepatic impairment, as clearance of this medicine may be reduced.

Answer

Children (6-16 years)
Start with 0.5-1㎎/㎏ in the evening during the first week. Thereafter, increase the daily dose by 0.5-1㎎/㎏ at intervals of 1-2 weeks and administer twice daily. If the patient has difficulty tolerating the increase, reduce the increment or extend the interval between increases. The dose and degree of increase should be determined according to clinical response. The recommended dose for monotherapy in children is 3-6mg/kg daily. Doses of up to 500㎎ daily have been used in children diagnosed with partial-onset seizures.
Children (2-16 years)
The recommended daily dose is approximately 5-9mg/kg, administered in 2 divided doses. During the first week, administer 25mg (or less, based on 1-3mg/kg daily) in the evening; thereafter, increase the daily dose by 1-3mg/kg at intervals of 1-2 weeks and administer in 2 divided doses until an appropriate clinical effect is achieved. Dose titration should be based on clinical effect. Doses of up to 30mg/kg daily have been administered and were generally well tolerated.

Question 3

What are the side effects of Topiramate 25 mg (Topiramate)?

Accepted Answer

suicidal thoughts, suicidal behavior, depression, abnormal changes in mood and behavior, sudden death, Stevens-Johnson syndrome, toxic epidermal necrolysis, sensory abnormality, insomnia, ataxia, concentration disorder, attention disorder, confusion, dizziness, fatigue, paresthesia, confusion, cognitive disturbance, agitation, emotional instability, loss of appetite, weakness, delirium, memory impairment, diplopia, vertigo, speech impairment, word selection disorder, nausea, nystagmus, psychomotor retardation, tremor, visual disturbance, weight loss, gait disturbance, aggressive response, apathy, perceptual disturbance, harmony disturbance, leukopenia, psychiatric symptoms, taste disorder, nephrolithiasis, thromboembolism, fatigue, weakness, back pain, chest pain, influenza-like symptoms, leg pain, allergy, flushing, body odor, edema, rigidity, dizziness, ataxia, speech impairment, nystagmus, sensory abnormality, tremor, harmony disturbance, sensory reduction, gait abnormality, involuntary muscle contraction, confusion, dizziness, nausea, dyspepsia, abdominal pain, constipation, gastroenteritis, thirst, gastrointestinal disturbance, gingivitis, auditory abnormality, weight loss, myalgia, skeletal pain, epistaxis, petechiae, insomnia, psychomotor retardation, neuroirritability, memory impairment, delirium, depression, concentration/attention disorder, loss of appetite, agitation, mood disorder, aggressive response, perceptual disorder, apathy, depersonalization, emotional instability, mastalgia, amenorrhea, menorrhagia, menstrual disturbance, prostate disorder, infection, viral infection, candidiasis, rhinitis, pharyngitis, sinusitis, dyspnea, erythematous rash, skin disorder, increased sweating, taste disorder, urinary tract infection, hematuria, urinary incontinence, frequent urination, urination abnormality, diplopia, visual disturbance, ocular pain, leukopenia, anemia, autonomic nervous system disorder, vasodilation, fever, syncope, halitosis, abdominal distension, alcohol intolerance, substernal chest pain, sudden death, hypertension, hypotension, orthostatic hypotension, tension and anxiety, erectile dysfunction, hallucination, hyperthyroidism, psychosis, hypokinesia, confusion, grand mal seizures, hyperactivity, leg cramps, reflex laxity, neurosis, migraine, akinesia, hypersensitivity, movement disorder, opposing tendencies, speech disorder, scotoma, hypotonia, dystonia, coma, encephalopathy, fecal incontinence, insomnia, personality disorder, decreased libido, manic response, suicide attempt, delusional response, increased appetite, delusion, paranoia, delirium, abnormal dreams, EEG abnormalities, goiter, thyroid disorder, diarrhea, vomiting, hemorrhoids, flatulence, gastroenteritis, gingival hyperplasia, dental caries, stomatitis, dysphagia, melena, gastritis, hypersalivation, hiccups, gastroesophageal reflux, tongue swelling, esophagitis, belching, tinnitus, earache, auditory hypersensitivity, angina, palpitations, AV block bradycardia, atrioventricular block, arrhythmia, atrial arrhythmia, atrial fibrillation, increased SGPT, increased SGOT, gallbladder disorder, increased γ-GT, dehydration, weight gain, thirst, hypokalemia, increased alkaline phosphatase, hypocalcemia, hyperlipidemia, acidosis, hyperglycemia, increased creatinine, hyperchloremia, dry eyes, diabetes, hypernatremia, abnormal serum folate, hyponatremia, hypocholesterolemia, hypoglycemia, hypophosphatemia, arthralgia, muscle weakness, arthropathy, osteoporosis, basal cell tumor, anemia, gum bleeding, thrombocytopenia, pulmonary embolism, lymphadenopathy, lymphadenitis, eosinophilia, lymphocytopenia, lymphocytosis, granulocytopenia, thrombocytosis, erythrocytosis, bone marrow suppression, pancytopenia, intermenstrual bleeding, leukorrhea, dysmenorrhea, vaginitis, amenorrhea, ejaculation disorder, galactorrhea, cough, bronchitis, asthma, bronchospasm, laryngospasm, acne, urticaria, alopecia, dermatitis, nail disorder, folliculitis, dry skin, eczema, skin depigmentation, psoriasis, photosensitivity reaction, erythematous rash, seborrheic dermatitis, decreased sweating, hair abnormality, brown spots, taste distortion, taste loss, tactile distortion, urinary difficulty, nephrolithiasis, urinary tract infection, frequency of urination, urinary incontinence, urinary retention, facial edema, kidney pain, nocturia, albuminuria, polyuria, oliguria, flushing, venous thrombosis, phlebitis, vascular occlusion, conjunctivitis, control disorder, glare, overflow lacrimation, strabismus, color blindness, myopia, mydriasis, cataract, corneal opacity, iritis, exacerbation of epilepsy, mental disorder, decreased comprehension, eye strain, weakness, chest discomfort, peripheral edema, edema, chest pain, headache, drowsiness, hypersomnia, tremor, sedation, dystonia, blurred vision, ocular pain, memory disorder, spasm, stuttering, confusional state, insomnia, anxiety, aggression, mania, hallucination, auditory hallucinations, visual hallucinations, paranoia, panic attack, panic disorder, panic response, suicidal thoughts, suicide attempt, suicidal impulses, suicidal behavior, hyperammonemia, hyperammonemic encephalopathy, hypohidrosis, hyperthermia, acute myopia syndrome, ocular pain, increased intraocular pressure, visual field loss, hyperchloremic metabolic acidosis, hypothermia, vasodilation, syncope, halitosis, abdominal distension, alcohol intolerance, substernal chest pain, sudden death, hypertension, hypotension, orthostatic hypotension, tension and anxiety, erectile dysfunction, hallucination, hyperthyroidism, psychosis, hypokinesia, confusion, grand mal seizures, hyperactivity, leg cramps, reflex laxity, neurosis, migraine, akinesia, hypersensitivity, movement disorder, opposing tendencies, speech disorder, scotoma, hypotonia, dystonia, coma, encephalopathy, fecal incontinence, insomnia, personality disorder, decreased libido, manic response, suicide attempt, delusional response, increased appetite, delusion, paranoia, delirium, abnormal dreams, EEG abnormalities, goiter, thyroid disorder, diarrhea, vomiting, hemorrhoids, flatulence, gastroenteritis, gingival hyperplasia, dental caries, stomatitis, dysphagia, melena, gastritis, hypersalivation, hiccups, gastroesophageal reflux, tongue swelling, esophagitis, belching, tinnitus, earache, auditory hypersensitivity, angina, palpitations, AV block bradycardia, atrioventricular block, arrhythmia, atrial arrhythmia, atrial fibrillation, increased SGPT, increased SGOT, gallbladder disorder, increased γ-GT, dehydration, weight gain, thirst, hypokalemia, increased alkaline phosphatase, hypocalcemia, hyperlipidemia, acidosis, hyperglycemia, increased creatinine, hyperchloremia, dry eyes, diabetes, hypernatremia, abnormal serum folate, hyponatremia, hypocholesterolemia, hypoglycemia, hypophosphatemia, arthralgia, muscle weakness, arthropathy, osteoporosis, basal cell tumor, anemia, gum bleeding, thrombocytopenia, pulmonary embolism, lymphadenopathy, lymphadenitis, eosinophilia, lymphocytopenia, lymphocytosis, granulocytopenia, thrombocytosis, erythrocytosis, bone marrow suppression, pancytopenia, intermenstrual bleeding, leukorrhea, dysmenorrhea, vaginitis, amenorrhea, ejaculation disorder, galactorrhea, cough, bronchitis, asthma, bronchospasm, laryngospasm, acne, urticaria, alopecia, dermatitis, nail disorder, folliculitis, dry skin, eczema, skin depigmentation, psoriasis, photosensitivity reaction, erythematous rash, seborrheic dermatitis, decreased sweating, hair abnormality, brown spots, taste distortion, taste loss, tactile distortion, urinary difficulty, nephrolithiasis, urinary tract infection, frequency of urination, urinary incontinence, urinary retention, facial edema, kidney pain, nocturia, albuminuria, polyuria, oliguria, flushing, venous thrombosis, phlebitis, vascular occlusion, conjunctivitis, control disorder, glare, overflow lacrimation, strabismus, color blindness, myopia, mydriasis, cataract, corneal opacity, iritis, exacerbation of epilepsy, mental disorder, decreased comprehension, eye strain, weakness, chest discomfort, peripheral edema, edema, chest pain, headache, drowsiness, hypersomnia, tremor, sedation, dystonia, blurred vision, ocular pain, memory disorder, spasm, stuttering, confusional state, insomnia, anxiety, aggression, mania, hallucination, auditory hallucinations, visual hallucinations, paranoia, panic attack, panic disorder, panic response, suicidal thoughts, suicide attempt, suicidal impulses, suicidal behavior, hyperammonemia, hyperammonemic encephalopathy, hypohidrosis, hyperthermia, acute myopia syndrome, ocular pain, increased intraocular pressure, visual field loss, hyperchloremic metabolic acidosis, hypothermia, vasodilation, syncope, halitosis, abdominal distension, alcohol intolerance, substernal chest pain, sudden death, hypertension, hypotension, orthostatic hypotension, tension and anxiety, erectile dysfunction, hallucination, hyperthyroidism, psychosis, hypokinesia, confusion, grand mal seizures, hyperactivity, leg cramps, reflex laxity, neurosis, migraine, akinesia, hypersensitivity, movement disorder, opposing tendencies, speech disorder, scotoma, hypotonia, dystonia, coma, encephalopathy, fecal incontinence, insomnia, personality disorder, decreased libido, manic response, suicide attempt, delusional response, increased appetite, delusion, paranoia, delirium, abnormal dreams, EEG abnormalities, goiter, thyroid disorder, diarrhea, vomiting, hemorrhoids, flatulence, gastroenteritis, gingival hyperplasia, dental caries, stomatitis, dysphagia, melena, gastritis, hypersalivation, hiccups, gastroesophageal reflux, tongue swelling, esophagitis, belching, tinnitus, earache, auditory hypersensitivity, angina, palpitations, AV block bradycardia, atrioventricular block, arrhythmia, atrial arrhythmia, atrial fibrillation, increased SGPT, increased SGOT, gallbladder disorder, increased γ-GT, dehydration, weight gain, thirst, hypokalemia, increased alkaline phosphatase, hypocalcemia, hyperlipidemia, acidosis, hyperglycemia, increased creatinine, hyperchloremia, dry eyes, diabetes, hypernatremia, abnormal serum folate, hyponatremia, hypocholesterolemia, hypoglycemia, hypophosphatemia, arthralgia, muscle weakness, arthropathy, osteoporosis, basal cell tumor, anemia, gum bleeding, thrombocytopenia, pulmonary embolism, lymphadenopathy, lymphadenitis, eosinophilia, lymphocytopenia, lymphocytosis, granulocytopenia, thrombocytosis, erythrocytosis, bone marrow suppression, pancytopenia, intermenstrual bleeding, leukorrhea, dysmenorrhea, vaginitis, amenorrhea, ejaculation disorder, galactorrhea, cough, bronchitis, asthma, bronchospasm, laryngospasm, acne, urticaria, alopecia, dermatitis, nail disorder, folliculitis, dry skin, eczema, skin depigmentation, psoriasis, photosensitivity reaction, erythematous rash, seborrheic dermatitis, decreased sweating, hair abnormality, brown spots, taste distortion, taste loss, tactile distortion, urinary difficulty, nephrolithiasis, urinary tract infection, frequency of urination, urinary incontinence, urinary retention, facial edema, kidney pain, nocturia, albuminuria, polyuria, oliguria, flushing, venous thrombosis, phlebitis, vascular occlusion, conjunctivitis, control disorder, glare, overflow lacrimation, strabismus, color blindness, myopia, mydriasis, cataract, corneal opacity, iritis, exacerbation of epilepsy, mental disorder, decreased comprehension, eye strain, weakness, chest discomfort, peripheral edema, edema, chest pain, headache, drowsiness, hypersomnia, tremor, sedation, dystonia, blurred vision, ocular pain, memory disorder, spasm, stuttering, confusional state, insomnia, anxiety, aggression, mania, hallucination, auditory hallucinations, visual hallucinations, paranoia, panic attack, panic disorder, panic response, suicidal thoughts, suicide attempt, suicidal impulses, suicidal behavior, hyperammonemia, hyperammonemic encephalopathy, hypohidrosis, hyperthermia, acute myopia syndrome, ocular pain, increased intraocular pressure, visual field loss, hyperchloremic metabolic acidosis, hypothermia, vasodilation, syncope, halitosis, abdominal distension, alcohol intolerance, substernal chest pain, sudden death, hypertension, hypotension, orthostatic hypotension, tension and anxiety, erectile dysfunction, hallucination, hyperthyroidism, psychosis, hypokinesia, confusion, grand mal seizures, hyperactivity, leg cramps, reflex laxity, neurosis, migraine, akinesia, hypersensitivity, movement disorder, opposing tendencies, speech disorder, scotoma, hypotonia, dystonia, coma, encephalopathy, fecal incontinence, insomnia, personality disorder, decreased libido, manic response, suicide attempt, delusional response, increased appetite, delusion, paranoia, delirium, abnormal dreams, EEG abnormalities, goiter, thyroid disorder, diarrhea, vomiting, hemorrhoids, flatulence, gastroenteritis, gingival hyperplasia, dental caries, stomatitis, dysphagia, melena, gastritis, hypersalivation, hiccups, gastroesophageal reflux, tongue swelling, esophagitis, belching, tinnitus, earache, auditory hypersensitivity, angina, palpitations, AV block bradycardia, atrioventricular block, arrhythmia, atrial arrhythmia, atrial fibrillation, increased SGPT, increased SGOT, gallbladder disorder, increased γ-GT, dehydration, weight gain, thirst, hypokalemia, increased alkaline phosphatase, hypocalcemia, hyperlipidemia, acidosis, hyperglycemia, increased creatinine, hyperchloremia, dry eyes, diabetes, hypernatremia, abnormal serum folate, hyponatremia, hypocholesterolemia, hypoglycemia, hypophosphatemia, arthralgia, muscle weakness, arthropathy, osteoporosis, basal cell tumor, anemia, gum bleeding, thrombocytopenia, pulmonary embolism, lymphadenopathy, lymphadenitis, eosinophilia, lymphocytopenia, lymphocytosis, granulocytopenia, thrombocytosis, erythrocytosis, bone marrow suppression, pancytopenia, intermenstrual bleeding, leukorrhea, dysmenorrhea, vaginitis, amenorrhea, ejaculation disorder, galactorrhea, cough, bronchitis, asthma, bronchospasm, laryngospasm, acne, urticaria, alopecia, dermatitis, nail disorder, folliculitis, dry skin, eczema, skin depigmentation, psoriasis, photosensitivity reaction, erythematous rash, seborrheic dermatitis, decreased sweating, hair abnormality, brown spots, taste distortion, taste loss, tactile distortion, urinary difficulty, nephrolithiasis, urinary tract infection, frequency of urination, urinary incontinence, urinary retention, facial edema, kidney pain, nocturia, albuminuria, polyuria, oliguria, flushing, venous thrombosis, phlebitis, vascular occlusion, conjunctivitis, control disorder, glare, overflow lacrimation, strabismus, color blindness, myopia, mydriasis, cataract, corneal opacity, iritis, exacerbation of epilepsy, mental disorder, decreased comprehension, eye strain

Question 4

What precautions should be taken when using Topiramate 25 mg (Topiramate)?

Accepted Answer

This medication may increase the risk of suicidal ideation or behavior, so if mood changes or unusual behavior occurs during treatment, it is essential to inform healthcare professionals immediately.

While taking this medication, severe skin reactions, such as sudden rashes, blisters, or mucosal damage may occur, so if such symptoms appear, stop taking the medication immediately and visit a hospital.

Taking this medication during pregnancy may pose risks of birth defects or growth disorders to the fetus, so women of childbearing potential should take a pregnancy test before use and ensure effective contraception is in place.

This medication may accumulate in patients with decreased renal function, so dosage adjustments should be made based on renal function, and patients undergoing dialysis may require dosage adjustment based on dialysis conditions.

This medication may affect the central nervous system and cause symptoms such as drowsiness, dizziness, and blurred vision; caution is necessary when driving or operating machinery.

Adequate hydration is essential during treatment, and if there are symptoms related to kidney stones or kidney issues, healthcare professionals should be consulted immediately.

Abrupt discontinuation of this medication may lead to seizures or worsening of conditions; therefore, dosage should be gradually reduced when stopping treatment.

There may be interactions with other medications, so it is crucial to inform healthcare professionals of any concurrent medications, especially contraceptives, certain anticonvulsants, lithium, and antidiabetic medications.

Topiramate 25 mg (Topiramate)

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