Allergy Medicines & Product Selection Guide

Allergy products come in several medication categories and dosage forms, including oral antihistamines, nasal sprays, and eye drops. Some are available over the counter while others require a prescription. The important product-selection questions are the active ingredient, dosage form, label warnings, expected drowsiness or other precautions, and whether another product already contains the same medicine.

Oral antihistamines

Oral antihistamines are widely used for allergy symptoms. Some older antihistamines can cause significant drowsiness, while newer options may cause less or little sleepiness. The exact effect and precautions depend on the product, so compare the current label rather than assuming all antihistamines are interchangeable.

Nasal sprays

Nasal products may contain different kinds of medicines. MedlinePlus notes that nasal corticosteroid sprays are an effective treatment category for allergic rhinitis, while antihistamine nasal sprays are another option. Some nasal products are OTC and others are prescription-only. A product's active ingredient, directions, age limits, and duration-of-use warnings should be checked before use.

Eye drops

Eye products for allergy symptoms can include lubricating drops as well as medicated antihistamine or other formulations. The exact label matters because products intended simply to lubricate the eye are not the same as medicated allergy drops. Contact lenses, age restrictions, preservatives, and other eye conditions may also affect which questions should be discussed with a pharmacist or eye-care professional.

Avoid duplicate active ingredients

Brand families often sell multiple versions with different ingredients, and the FDA Drug Facts label is designed to show the active ingredient, purpose, warnings, and directions. If you are using more than one allergy or cold product, compare their active ingredients before combining them. This is especially useful when one product is marketed for allergy symptoms and another is a multi-symptom cold medicine.

Prescription allergy products and refills

If a prescriber has selected a prescription nasal spray, eye drop, oral medicine, or another allergy product, use the prescription label to confirm the exact active ingredient, strength, and dosage form. A refill question should be handled as a product-identification task rather than by substituting a similarly marketed OTC product without professional review.

What to compare before choosing a product

• active ingredient and strength;
• oral, nasal, or ophthalmic dosage form;
• OTC or prescription status;
• drowsiness and driving or machinery warnings;
• age restrictions and product-specific directions;
• other medicines or health conditions listed in the warnings section.

If a prescription allergy medicine has been ordered, confirm the exact product, strength, formulation, and refill status. For an OTC product, bring a medication list if you want a pharmacist to check for overlapping ingredients or interaction concerns. For more medication-focused guides, return to Medication & Pharmacy Topics.