Can I take St John’s Wort with Phenytoin?
Oral Hypericum perforatum preparations with oral phenytoin; induction strength varies across products.
Read the interaction guide →Medication overview
Phenytoin: Supplement Interactions
Find the available answers about phenytoin and supplements. Each guide explains its evidence and the forms it covers.
Supplement combinations
9 published guides. Coverage is limited to the combinations listed.
Can I take Convolvulus Prostratus with Phenytoin?
Convolvulus prostratus, including research under its scientific synonym C. pluricaulis, with phenytoin; a named Ayurvedic mixture is not automatically equivalent.
Read the interaction guide →Can I take Magnesium with Phenytoin?
Oral magnesium products with oral phenytoin; antacid salts, nutritional preparations and intravenous treatment differ.
Read the interaction guide →Can I take Garden Cress with Phenytoin?
Lepidium sativum preparations with oral phenytoin; tested animal exposure does not establish effects of ordinary food or all extracts.
Read the interaction guide →Can I take Ginkgo Biloba with Phenytoin?
Ginkgo leaf products with phenytoin; seed poisoning and multicomponent exposures do not establish the effect of every leaf extract.
Read the interaction guide →Can I take Black Pepper with Phenytoin?
Piper nigrum products with oral phenytoin; purified piperine, pepper-containing food and commercial extracts have different exposures.
Read the interaction guide →Can I take Calcium with Phenytoin?
Oral calcium products with oral phenytoin; antacid salts, nutritional preparations and intravenous treatment differ.
Read the interaction guide →Can I take Folic Acid with Phenytoin?
Folic acid with oral phenytoin; folate status, pregnancy needs, formulation and individual seizure control matter.
Read the interaction guide →Can I take Vitamin B6 with Phenytoin?
Oral vitamin B6, particularly high-dose pyridoxine, with phenytoin; different vitamers and nutritional amounts are not assumed equivalent.
Read the interaction guide →A supplement missing from this list has not been cleared for use with the medication. These pages do not assess every product, formulation, or combination.
Publication status, clinical review and change history are shown in each interaction guide.