[Local anesthesia and beta receptor blockers in dentistry. (Study on an injectable combination of lidocaine and betadrenol)].

A double blind trial was undertaken to determine whether the addition of the beta-receptor blocker Betadrenol in two different doses to a lidocaine solution containing adrenaline could influence the exogenous and endogenous beta-adrenergic effects in the field of dental interventions under local anesthesia. It could be shown that already very small amounts of the beta-receptor blocker Betadrenol could suspend beta-adrenergic stimulation of the heart and so prevent unwanted circulatory reactions without side effects on the central nervous system.