Final answer:
For watery, itchy eyes and sneezing likely caused by hay fever from a flower bouquet, treatment includes antihistamines, decongestants, and lubricating eye drops, along with avoiding known allergens.
Step-by-step explanation:
The most appropriate treatment for someone experiencing watery, itchy eyes, and sneezing after receiving a flower bouquet is likely due to allergic rhinitis, commonly known as hay fever. This is an allergic response to plant pollens that are present in the bouquet. First-line treatment includes over-the-counter antihistamines, which can reduce allergic symptoms by blocking the action of histamine, a substance in the body that causes allergic symptoms. In addition, decongestants may help relieve nasal congestion, and lubricating eye drops can alleviate watery, itchy eyes. For ongoing management, allergists may recommend skin testing to identify specific allergens, and for severe allergic reactions, a course of corticosteroids might be prescribed. Patients should follow their healthcare provider's advice and also try to avoid contact with known allergens.