penicillin G -'jē n the penicillin C16H18N2O4S that constitutes the principal or sole component of most commercial preparations and is used chiefly in the form of its stable salts (as the sodium salt C16H17N2NaO4S or potassium salt C16H17KN2O4S) called also benzylpenicillin see penicillin G benzathine, penicillin G procaine
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the most widely used form and the first of the penicillins developed for medicinal use. It is used in the form of the benzathine, potassium, procaine, and sodium salts, principally in the treatment of infections due to penicillin-susceptible gram-positive bacteria, gram-negative cocci, Treponema pallidum, and Actinomyces israelii. Called also benzylpenicillin.Medical dictionary. 2011.