[The influence of the beta-mimetic Ritodrine on the potassium balance under tocolytic therapy (author's transl)].

: A time-dependent picture was to be obtained of the potassium concentration by means of a continual determination in serum, urine and red cells during tocolytic therapy with beta-mimetic drugs for inhibiting premature uterine activity. The results obtained under bulk tocolysis with Ritodrine (Prepar) infusions and after a twelve-hour interval of strict food deprivation, speak in favour of a rise in potassium elimination via the urine, and, therefore, of a substitution, contrary to the opinion held until now.