Piriton a potent antihistamine with a wide safety margin and minimal sedative effects : ringlet (plastead's brown).

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<p>One of a series of advertising cards (butterfly species) issued by Allen & Hanburys advertising Piriton, an antihistamine active against hayfever, showing ringlet (plastead's brown) butterflies.</p>

Piriton : the most prescribed antihistamine : ringlet (plastead's brown).

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