Topiramate
Topiramate is an anticonvulsant medicine. It is used to control epilepsy and to reduce how often migraine headaches occur. It is not a treatment for a migraine that has already started. The medicine comes as film-coated tablets in three strengths.
Medicine containing Topiramate
Key points
- Topiramate belongs to the anticonvulsant class and calms overexcited nerve signalling in the brain.
- It is taken to prevent migraine attacks, not to ease migraine pain once one has begun.
- Kidney stones, metabolic acidosis and suicidal thoughts are serious effects that need immediate medical attention.
What Topiramate is used for
Two main purposes are served by this medicine. In epilepsy it helps control seizures. Used for migraine prophylaxis, it lowers how often attacks happen. It does not relieve a headache that is already under way, so it is not a painkiller for an attack in progress.
How it works
Topiramate is a sulfamate-substituted monosaccharide that acts in several ways at once. It blocks voltage-gated sodium channels, strengthens the effect of GABA, an inhibitory neurotransmitter, and blocks glutamate receptors. Together these actions damp down neuronal hyperexcitability. Its effect begins within 2 to 3 hours and lasts roughly 20 to 30 hours.
Forms and brands
MayChemist supplies Topamax film-coated tablets containing topiramate in 25 mg, 50 mg and 100 mg strengths. Pharmacy partners in India ship orders to Malaysia in discreet packaging.
Safety
Anyone hypersensitive to topiramate should not take it. Keep well hydrated during treatment, watch for changes in mood, and be alert to the risk of angle-closure glaucoma. Tingling or numbness, loss of appetite, weight loss and tiredness are recognised minor effects. Memory problems, speech difficulties and depression are moderate ones. Kidney stones, metabolic acidosis and suicidal ideation are serious and need immediate medical attention. Topiramate interacts with valproate, phenytoin and carbamazepine. It can make hormonal contraceptives less effective, so an additional non-hormonal method is needed. Sweating may be reduced, which makes it harder for the body to cool down. It is not recommended for children under 2 years. Avoid it in pregnancy, where fetal risk has been identified, and note that it passes into breast milk and requires monitoring. Treatment should not be stopped suddenly; the dose is reduced under medical supervision because abrupt withdrawal can trigger severe seizures.
What the sources say
- Topiramate has been linked to birth defects when taken during pregnancy, so a doctor will usually change the patient to a different medicine. (NHS)
- Mental health may change in unexpected ways and suicidal thoughts can appear while topiramate is taken for epilepsy, mental illness or other conditions. (MedlinePlus)
- Hormonal contraceptives, including pills, patches, rings and injections, may work less well during treatment. (MedlinePlus)
- Topiramate can prevent sweating and make it harder for the body to cool down when the weather is very hot. (MedlinePlus)
Further reading
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