Effects of ethanol and tobacco on time judgment.

To determine the effects of the joint administration of tobacco and ethanol on short-interval time production and to search for differences between the ascending, the peak and the descending limb of the blood alcohol curve, two groups of 6 male subjects were tested on intervals of 1.5, 4.0 and 9.0 sec. Ethanol at 0.06% and 0.08% blood alcohol significantly lengthened the scores and one cigarette produced lower scores. The relationship between level of blood alcohol and time scores reversed in the latter part of the test session. The results are discussed in terms of effects of drugs on arousal systems.