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Phenytoin

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Managing interactions between medicines and enteral feeds

7 April 2025Learn about the types of feed, some of the most common medicine and feed interactions and how to manage them.

Using folic acid and phenytoin safely

12 April 2024Folic acid interacts with phenytoin and can reduce phenytoin blood levels. Concomitant use is possible with careful management of the interaction.

Managing interactions with methotrexate

28 December 2023Guidance on frequently asked questions on medicine interactions with low dose methotrexate.

Specific medicine switches for solid dose and liquid formulations

13 September 2023Certain medicines require additional monitoring and dose adjustments when switching between solid dose and liquid formulations.

Example medicines to prescribe by brand name in primary care

27 March 2022Prescribe certain medicines by brand to ensure supply of the same product. Examples are grouped by therapeutic area. The list of products is not exhaustive.

Phenytoin monitoring

22 June 2021