What symptoms are antihistamines particularly useful for treating in allergic rhinitis?

Antihistamines are particularly effective for treating symptoms associated with allergic rhinitis, including itching, sneezing, and rhinorrhea. These symptoms occur as a result of histamine release in response to allergens, and antihistamines work by blocking the action of histamine at its receptors. This action helps to alleviate the discomfort associated with these symptoms, providing relief for individuals suffering from allergies.

While congestion and nasal blockage can be experienced during allergic rhinitis, they are primarily due to nasal swelling and inflammation rather than directly related to histamine activity. Therefore, while some antihistamines may offer minimal help with this aspect due to their drying effects, they are not the primary treatment for congestion.

Chronic cough and wheezing are more commonly associated with respiratory conditions like asthma, which involve bronchial inflammation and not primarily histamine release. Thus, antihistamines do not adequately address these symptoms.

In summary, the use of antihistamines specifically targets the histaminergic symptoms of itching, sneezing, and rhinorrhea, making them an ideal choice for these particular manifestations of allergic rhinitis.