Does a Claritin® RediTabs® tablet have to be placed on the tongue? Read more about Does a Claritin® RediTabs® tablet have to be placed on the tongue? Does a Claritin® RediTabs® tablet have to be placed on the tongue? The product does not have to be placed on the tongue. A Claritin® RediTabs® tablet will be effective if it dissolves anywhere in your mouth. CLARITIN® Claritin-D® Tablets 24-Hour