FIELD : medicine; pharmaceuticals.SUBSTANCE : invention relates to the pharmaceutical industry and is a composition containing medium chain triglyceride (TC), having structural formula (1), where each R' , R' ' and R' ' ' esterified with a glycerol chain is an independent fatty acid with 5-12 carbon atoms, for use in combination with an anti-epileptic agent (AED) to enhance the AED effect in an animal, composition contains 1 wt.?% to 15 wt.?% TCS and wherein composition also contains 15 to 50?% protein, 5 wt.?% to 40 wt.?% fat, 5 wt.?% to 10 wt.?% ash and has a moisture content from 5 wt.?% to 20 wt.?%.EFFECT : invention provides higher therapeutic effectiveness of the administered antiepileptic agent (AED).6 cl, 1 ex, 3 tbl