Interações medicamentosas
Fosphenytoin + Pyrimethamine
Gravidade: Moderada
Fosphenytoin and Pyrimethamine: moderate interaction.
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Para profissionais de saúde — apenas referência. Esta página é um resumo breve, não é aconselhamento médico nem substitui a bula oficial ou o julgamento clínico. Verifique sempre antes de prescrever ou dispensar.
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Resumo
Pyrimethamine is an antifolate and phenytoin (the active form of fosphenytoin) can also lower folate status. Together they may add to folate deficiency and haematological toxicity. Reports of reduced anticonvulsant effect are inconsistent.
O que esta interação significa em palavras simples
Fosphenytoin and Pyrimethamine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Fosphenytoin belongs to Central Nervous System; Pyrimethamine belongs to Anti Parasitic.
Por que acontece
Additive folate antagonism; pyrimethamine inhibits dihydrofolate reductase and phenytoin impairs folate handling, and phenytoin levels may also change through unclear mechanisms.
O que fazer
Monitor complete blood counts and seizure control, and check phenytoin concentrations if control changes. Give folinic acid with pyrimethamine as usually recommended.
O que perguntar ao farmacêutico
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Outras interações de Pyrimethamine
- Deferiprone + Pyrimethamine Grave
- Eliglustat + Pyrimethamine Grave
- Acalabrutinib + Pyrimethamine Moderada
- Brexpiprazole + Pyrimethamine Moderada
- Dapsone + Pyrimethamine Moderada
- Folic acid + Pyrimethamine Moderada
Outras interações de Fosphenytoin
- Dronedarone + Fosphenytoin Contraindicada
- Fosphenytoin + Ledipasvir-sofosbuvir Contraindicada
- Fosphenytoin + Lorlatinib Contraindicada
- Fosphenytoin + Lurasidone Contraindicada
- Fosphenytoin + Ranolazine Contraindicada
- Fosphenytoin + Sofosbuvir-velpatasvir-voxilaprevir Contraindicada
Perguntas frequentes
Can I take Fosphenytoin with Pyrimethamine?
MediHelp rates the interaction as moderate. Fosphenytoin and Pyrimethamine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Pyrimethamine is an antifolate and phenytoin (the active form of fosphenytoin) can also lower folate status. Together they may add to folate deficiency and haematological toxicity. Reports of reduced anticonvulsant effect are inconsistent.
How serious is the interaction between Fosphenytoin and Pyrimethamine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor complete blood counts and seizure control, and check phenytoin concentrations if control changes. Give folinic acid with pyrimethamine as usually recommended.
What other medicines interact with Pyrimethamine?
MediHelp also lists interactions of Pyrimethamine with, for example, Deferiprone, Eliglustat, Acalabrutinib. The full list is on the Pyrimethamine page.
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