Abstract: Xanthine derivatives having antiasthmatic activity are disclosed which have the following formula: ##STR1## where R is a linear or branched alkyl chain group of from one to six carbon atoms, R.sub.1 is a linear or branched alkyl or hydroxyalkyl group of from one to six carbon atoms. However, if R is methyl, then R.sub.1 is not methyl, ethyl or propyl; if R is ethyl, then R.sub.1 is not methyl or ethyl; and if R is methyl or n-butyl, then R.sub.1 is not 2-hydroxypropyl. Also disclosed are pharmaceutical compositions containing such xanthine derivatives.

Abstract: The present invention relates to 8-azaxanthines derivatives having antiasthmatic activity and the general formula: ##STR1## wherein: R.sub.1 is a hydrogen or a lower alkyl of from one to six carbon atoms or an arylalkyl group;R.sub.2 is a lower alkyl of from one to six carbon atoms or an aryl or an arylalkyl group;n=from 1 to 3 ##STR2## wherein: R.sub.3 and R.sub.4 are lower alkyl of one to four carbon atoms or complete together a five or six member heterocycle;and wherein the substitution in the triazole ring concerns the 7- or 8- or 9- positions: their salts which are physiologically acceptable, their pharmaceutical compositions and the process for preparing them.