Are systemic antihistamines helpful in allergic conjunctivitis?

• A. No, They Are Not Helpful
• B. Yes, They Are Helpful
• C. Only In Severe Cases
• D. They Should Always Be Used With Steroids

Answer: (A)

Allergic conjunctivitis is driven by local histamine release on the ocular surface, so targeting the eye directly with topical agents provides the most reliable relief. Systemic antihistamines mainly help with nasal allergy symptoms and have limited, inconsistent effects on the conjunctiva; they can also dry the tear film and potentially worsen ocular irritation. For addressing the eye itself, topical antihistamines and mast cell stabilizers are preferred, making systemic antihistamines not helpful as a primary treatment for the ocular component. They might be used for concomitant allergic rhinitis, but they do not substitute for topical therapy, and pairing them with steroids is not a standard approach for uncomplicated allergic conjunctivitis.