Oral antihistamines reduce eye symptoms but often not enough, because a tablet has to reach the eye through the bloodstream at whatever concentration is left. Drops act where the problem is.
For people whose dominant complaint is itching, redness and watering, adding drops usually does more than switching antihistamine tablet.
The Main Types
Antihistamine drops
Fast-acting relief of itching and redness, working within minutes. Options available in UK pharmacies include azelastine and antazoline-containing products. Best for symptoms you need to relieve now.
Mast cell stabilisers
Sodium cromoglicate is the common one, widely available over the counter and also used in children. It prevents mast cells releasing histamine in the first place.
The catch: it is preventive and takes days to build up. Started on a bad day it seems useless. Started two weeks before your season, it works well. Used four times a day, consistently, it earns its place.
Dual-action drops
Combine antihistamine and mast cell stabilising effects, giving both immediate relief and preventive action. Ketotifen and olopatadine are examples.
Lubricating drops
No active anti-allergy ingredient, but they physically wash pollen from the eye surface and relieve dryness and grittiness. Cheap, safe, and useful alongside anything else.
Getting the Technique Right
- Wash your hands
- Tilt your head back and pull down the lower lid to make a pocket
- Look up and squeeze one drop into the pocket, without touching the eye or lashes with the bottle
- Close your eye gently for 30 seconds rather than blinking hard, which pumps the drop away
- Press lightly at the inner corner of the eye for a few seconds to keep the drop in the eye rather than draining into the nose
If you use more than one type, leave five minutes between them, or the second simply washes out the first.
Contact Lenses
Most drops should not be used while wearing soft lenses, largely because of preservatives — typically remove lenses, use the drop, and wait around 15 minutes. Preservative-free versions exist and are worth asking about if you wear lenses daily.
Allergy season is also a good time to consider glasses more often. Lenses trap pollen against the eye surface and make everything worse.
What Not to Use
Redness-removing drops containing vasoconstrictors shrink blood vessels to make eyes look white. They do not treat the allergy, and prolonged use produces rebound redness that is worse than what you started with. They are a cosmetic product being used as a medical one.
When It Is Not Hay Fever
See someone promptly rather than treating yourself if you have:
- Eye pain, as opposed to itching
- Changes in vision
- Marked sensitivity to light
- Thick, coloured discharge, or lids stuck together in the morning
- One eye affected and not the other
Allergic eye symptoms are typically bilateral and itchy. Pain, unilateral symptoms and visual change point elsewhere.
Practical Season Planning
If eyes are your main problem, start a mast cell stabiliser two to four weeks before your usual onset, keep an antihistamine drop for flare days, and carry lubricating drops for high-pollen afternoons. Wraparound sunglasses do more than people expect, and cost nothing after the first purchase.