New beta-amino-alcohols were synthesized and showed beta-blocking biological activity. These potential drugs, as well as natrium salicylate, have been entrapped in phospholipid liposomes. Drug-containing liposomes were prepared from egg lecithin and DPPC (Dipalmitoylphosphatidylcholine) by the injection method. Turbidity measurements and dynamic light scattering were used to characterise the liposome and to study their stability during storage. The entrapment efficiency of the drugs in liposomes was correlated to the partition coefficient of the drugs.
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