PT - JOURNAL ARTICLE ED - , TI - Interactions between phenytoin, phenobarbitone and other drugs AID - 10.1136/dtb.14.4.13 DP - 1976 Feb 13 TA - Drug and Therapeutics Bulletin PG - 13--14 VI - 14 IP - 4 4099 - http://dtb.bmj.com/content/14/4/13.short 4100 - http://dtb.bmj.com/content/14/4/13.full SO - Drug Ther Bull1976 Feb 13; 14 AB - Many epileptic patients take more than one anticonvulsant drug. Interactions between these anticonvulsants and with other non-anticonvulsant medicaments are common.1 As with other drugs, interactions may occur at several sites, including absorption, plasma protein binding, biotransformation and excretion. We recently discussed the effects of anti-epileptic drugs on vitamin D, steroid and folate absorption and metabolism.2