What should you know about prescription allergy meds?

A clinician chooses treatment according to the symptom pattern and suspected trigger. An antihistamine can reduce itching, sneezing, and a runny nose; a nasal spray may reduce swelling and blockage; and eye drops can soothe allergy-related irritation. Allergic rhinitis often affects the nose and throat, while allergic conjunctivitis mainly affects the eyes. Dust mites and pets are examples of triggers. Explore [Allergic Rhinitis](/conditions/allergic-rhinitis/) or [Allergic Conjunctivitis](/conditions/allergic-conjunctivitis/) for more context.

Use the prescribed product exactly as directed, especially when a spray or drops need regular use before they give their full benefit. Wash hands before eye drops, avoid touching the applicator tip, and check whether a tablet could cause drowsiness before driving. Reduce exposure to a known trigger where practical, such as keeping a pet out of the bedroom or using dust-control measures. Tell the pharmacist about pregnancy, long-term conditions, and other medicines. Track whether your blocked nose, itchy eyes, itchy throat, or runny nose is improving.

Seek urgent help for swelling of the lips, tongue, or throat, trouble breathing, wheezing, collapse, or rapidly spreading hives. Arrange a review if treatment causes troublesome effects, symptoms are worsening, or nasal blockage or eye irritation affects sleep or vision. Severe eye pain or a marked change in vision needs prompt assessment rather than allergy treatment alone.

Ask which symptoms the prescription targets, when to use each product, whether drowsiness is possible, and how long to continue it. Ask whether testing or trigger avoidance would help if symptoms keep returning, including possible [House Dust Mite Allergy](/conditions/house-dust-mite-allergy/).