Figure 5  Piracetam improves cognitive function in men after hypoxia. The ability of 12 healthy volunteers to concentrate in a low oxygen pressure tank was assessed by measuring errors in a visual attention test in a placebo-controlled crossover trial in which volunteers were given 4.8 g piracetam daily for 4 days and 7.2 g on the fifth day. Depending on the time of hypoxia, errors were observed. Error number was significantly reduced by piracetam treatment, especially for the longer hypoxic period. Data are modified from Demay and Bande (1980).