Mechanism of action of phenazopyridine:- It is a competitive inhibitor of
dihydrofolate synthase. It is required for
synthesis of folic acid and it is an essential component for bacterial
growth. The multiplication of bacteria is therefore inhibited by the action of
phenazopyridine.
Reference:-
Tripathi k.d.,"Essentials of Pharmacology",published by
jaypee brother publication ,new dehli,seventh edition,p.no:-761
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