Abstract: The invention relates to a pharmaceutical composition comprising a compound selected from the group consisting of desethylamiodarone and pharmaceutically acceptable salts, hydrates and solvates thereof, together with pharmaceutically acceptable excipients, vehicle and/or carrier, as well as the pharmaceutical composition for use in the treatment and prevention of atrial fibrillation with fewer side effects than its parent compound.

Abstract: The present invention relates to novel, antiarrhythmically active phenoxyalkylamine derivatives possessing a double point of attack. More particularly, the present invention relates to new phenoxyalkylamine derivatives of the formula (1) wherein R1 and R2, independently from each other, mean hydrogen, halogen or C1-4 alkyl group; R3, R4 and R5, independently from each other, stand for hydrogen or C1-4 alkyl group; R6 represents hydrogen, C1-4 alkyl or benzyl group; R7 means nitro group or amino group optionally monosubstituted by C1-4 alkyl, benzoyl, C1-4 alkylcarbonyl, C1-4 alkylsulfonyl, C1-4 alkylcarbamoyl or C1-4 alkylthiocarbamoyl group; both n and m are 0 or 1, with the proviso that R2 is different from hydrogen, when R1 is hydrogen, as well as stereoisomers or mixtures of stereoisomers thereof, acid addition salts thereof and hydrates, prodrugs and metabolites of all these compounds.