Methdilazine is only found in individuals that have used or taken this drug. It is a phenothiazine compound with antihistaminic activity. It is used in the treatment of various dermatoses to relieve pruritus.Methdilazine binds to the histamine H1 receptor. This blocks the action of endogenous histamine, which subsequently leads to temporary relief of the negative symptoms brought on by histamine.

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Mechanism of Action