A comparative, cross-over trial was conducted to determine patient preference for the slow release potassium supplements Slow K and Leo K. Fifty-seven patients took part in the trial and the majority found Leo K preferable to Slow K, principally because Leo K was easier to swallow and caused fewer side-effects. In order to increase the chances of patients following the prescriber's instructions it would seem logical to prescribe Leo K rather than Slow K on the basis of patient preference.
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