Abstract : Purpose. Investigation of the correlation between document supply by INIST-CNRS and citations of 89 pharmacology and pharmacy periodicals in 1992-2004. Investigation of the influence of electronic periodicals. Methods. Analysis of the cards of document supply-citation correlation for the 89 periodicals during 13 years. Making of four groups of periodicals. Results. The four groups are respectively made of 19, 16, 47 and 7 periodicals from the most supplied and cited (the more expensive and aged) to the less supplied and cited. Their characteristics are analysed taking into account their evolution during 1992-2004. The periodical Thérapie is in the group of periodicals very supplied but less cited. Conclusion. The correlation between document supply and citations decreases during the investigated time and is influenced by the coming of electronic periodicals.