Abstract: Novel indolizine derivatives represented by the general formula: ##STR1## and the pharmaceutically acceptable acid addition salts thereof, wherein: R represents an alkyl radical having from 1 to 8 carbon atoms, or a phenyl group non-substituted or bearing one or two substituents, selected from halogen atoms and from lower alkyl and alkoxy groups,X.sub.1 represents hydrogen, chlorine, bromine, iodine, methyl or methoxy,A represents a group selected from: ##STR2## in which X.sub.2 represents hydrogen, chlorine, bromine, iodine, methyl or methoxy and X.sub.3 represents hydrogen, chlorine, bromine, iodine or methyl,R.sub.1 represents a methyl, ethyl, n-propyl or n-butyl radical,n represents an integer in the range of 2 to 6 inclusive,with the proviso that when both X.sub.2 and X.sub.3 represent hydrogen or methyl, X.sub.1 is other than hydrogen.They are effective for treating pathological syndromes of the heart and particularly angina pectoris and cardiac arrhythmias.

Abstract: Novel indolizine derivatives represented by the general formula: ##STR1## and the pharmaceutically acceptable acid addition salts thereof, wherein: R represents an alkyl radical having from 1 to 8 carbon atoms, or a phenyl group non-substituted or bearing one or two substituents, selected from halogen atoms and from lower alkyl and alkoxy groups,X.sub.1 represents hydrogen, chlorine, bromine, iodine, methyl or methoxy,A represents a group selected from: ##STR2## in which X.sub.2 represents hydrogen, chlorine, bromine, iodine, methyl or methoxy and X.sub.3 represents hydrogen, chlorine, bromine, iodine or methyl,R.sub.1 represents a methyl, ethyl, n-propyl or n-butyl radical,n represents an integer in the range of 2 to 6 inclusive,with the proviso that when both X.sub.2 and X.sub.3 represent hydrogen or methyl, X.sub.1 is other than hydrogen.They are effective for treating pathological syndromes of the heart and particularly angina pectoris and cardiac arrhythmias.

Abstract: Novel pyridoxine derivatives represented by the general formula: ##STR1## in which: R represents a radical ##STR2## --CH.sub.2 --(CH.sub.2).sub.n --CH.sub.2 --OR.sub.2 or ##STR3## in which n represents 0 or 1, X and X.sub.1, which are different, represent hydrogen or methyl, Y represents hydrogen or methyl and R.sub.2 represents a phenyl group non-substituted or bearing one or two substituents selected from the group consisting of fluorine, chlorine and bromine and of the radicals methyl, ethyl, n-propyl, isopropyl and methoxy,R.sub.1 represents hydrogen or a radical of formula ##STR4## in which R.sub.3 represents a straight-chain alkyl radical having from 1 to 4 carbon atoms and pharmaceutically acceptable acid addition salts thereof.These compounds present .alpha.-antiadrenergic properties some of them also presenting .beta.-antiadrenergic, antihypertensive and central depressant effects.