Findings in the study of the effect of a single dose of a phitoadaptogen on concentration, occulomotor coordination and short-term memory with five human subjects in long-term isolation and confinement (ECOPSY-95) are reported. A complex phitopreparation developed by the Swedish Institute of Remedy Herbs (Heteborg) with tentatively name Adapt was used. Tests based on the double blind method were conducted within 1.5 and 4 hours following taking. Analysis of results displayed a significant improvement of work ability four hours after the single dose of the phitoadaptogen attested by a reduced number of erroneous reproduction of stimulating information from memory. Accuracy of compensatory tracking was found to grow much higher.