Antiarrythmic medicaments with a lower toxicity and longer-lasting activity then lidocain, whic can be administered orally or parenterally, contain a cpd. of formula PhO-CH2-CHOH-CH2-O-CH2CH2-N(Et)2 and/or an acid-addn. salt (esp. hydrochloride) thereof. The medicaments can also contain other active ingredients, e.g. beta-receptor blockers and/or propanthelin bromide.
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