Seventy-three thirsty, hungry, or hungry and thirsty rats were given a choice between water and sodium saccharin in concentrations which were equivalent to the sodium saccharin component of a compound used in earlier studies (Strouthes & Navarick, 1967; Strouthes, Volo, & Unger, 1974) and which consisted of sodium saccharin and soda bicarbonate mixed in equal amounts. Intakes of sodium saccharin and sodium saccharin + soda bicarbonate under food- and water-deprivation conditions were markedly similar in pattern of drinking as well as in volumes consumed during the first 90 min of testing. When undeprived, rats tended to drink more sodium saccharin + soda bicarbonate relative to water than sodium saccharin. Thus, if these substances are offered in a choice with water, sodium saccharin + soda bicarbonate in concentrations used in these studies is entirely equivalent to sodium saccharin under a variety of deprivation conditions. The two substances, however, may not be equivalent for undeprived rats. The generality of earlier conclusions based on drinking of the compound may he extended to studies using just the sodium saccharin component.