Consistent retrieval during serial learning of nonsense syllables was investigated under sabeluzole (10 mg b.i.d. for 7 days) and placebo. The same material was relearned 1 week after withdrawal of the drug. During learning a twofold improvement in retrieval efficiency was seen when volunteers learned new material under steady-state levels of sabeluzole. During relearning, material originally learned under sabeluzole was significantly better retrieved than material learned under placebo. The results suggest that sabeluzole influences basic mechanisms involved in storage and retrieval of new information.