4-THIENYL-DIHYDROPYRIDINES

Blood sugar levels are reduced by administration of novel 4-thienyl-dihydropyridines of the formula in which R1 represents 1 or 2 halogen atoms, or represents straight-chain, branched or cyclic alkyl with up to 8 carbon atoms, R2 represents a straight-chain, branched or cyclic, saturated or unsaturated hydrocarbon radical which has up to 15 carbon atoms, is optionally interrupted by one or two oxygen atoms, -N-phenyl or -SOn-(n=0, 1 or 2) and is optionally substituted by halogen, phenyl, hydroxyl, cyano, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, pyridyl, piperidino, N-phenylpiperazino, N-methylpiperazino, morpholino or N-benzyl-N-benzyl-N-methyl-amino, R3 represents hydrogen, or represents straight-chain, branched or cyclic alkyl which has up to 6 carbon atoms and is optionally substituted by halogen, hydroxyl, amino or amino-C1-C6-alkoxy, or represents cyano or formyl and R4 represents hydrogen or a straight-chain, branched or cyclic alkyl radical which has up to 10 carbon atoms, is optionally interrupted by one or two oxygen atoms in the chain and is optionally substituted by halogen, cyano, hydroxyl, phenyl, carboxyl, C1-C6-alkoxycarbonyl, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, formyl, piperidino, morpholino or thiomorpholino, or physiologically acceptable salts thereof.