Opatanol

Opatanol is the brand name for olopatadine hydrochloride eye drops, an antiallergic agent used for the symptomatic treatment of seasonal allergic conjunctivitis.

It provides relief from the itching, redness, tearing, and swelling of the eyes caused by allergic responses to environmental allergens such as pollen, pet dander, and dust mites.

Olopatadine has a dual mechanism of action: it acts as a selective histamine H1 receptor antagonist and also stabilises mast cells, preventing the release of histamine and other inflammatory mediators.

This dual action makes it particularly effective, as it both blocks the immediate allergic response and reduces the ongoing inflammatory cascade that sustains symptoms.

Opatanol eye drops are well tolerated and have a rapid onset of action, providing symptom relief within minutes of instillation.

The formulation is designed for topical ophthalmic use and has low systemic absorption, minimising the risk of systemic side effects commonly associated with oral antihistamines such as drowsiness.

Instil one drop into the affected eye or eyes twice daily, approximately 8 hours apart. Tilt your head back, pull down the lower eyelid to create a small pocket, and place the drop into this space.

Close your eye gently for 1 to 2 minutes and press lightly on the inner corner of the eye to minimise drainage into the nasal passage.

Avoid touching the dropper tip to your eye or any surface to prevent contamination.

If you wear contact lenses, remove them before instilling the drops and wait at least 15 minutes before reinserting.

One drop in each affected eye twice daily (morning and evening). The recommended concentration is 1 mg/ml (0.1%). Do not exceed the recommended dosage.

Treatment can be continued for the duration of the allergy season as needed. No dose adjustment is required in elderly patients or those with renal or hepatic impairment.

Common (1 in 10 to 1 in 100): headache, dysgeusia (abnormal taste), mild burning or stinging upon instillation, dry eye.

Uncommon (1 in 100 to 1 in 1,000): blurred vision, increased lacrimation, eye pain, eyelid oedema, eye irritation, nasal dryness.

Rare (1 in 1,000 to 1 in 10,000): dizziness, drowsiness, swelling of the face, erythema around the eye. Most side effects are mild and transient, resolving within minutes of instillation.

Opatanol eye drops contain benzalkonium chloride as a preservative, which may cause irritation and can be absorbed by soft contact lenses.

Remove contact lenses before application and wait at least 15 minutes before reinserting. If you are using other eye drops, allow at least 5 minutes between applications.

If eye symptoms worsen or persist despite treatment, consult your doctor. Opatanol is for topical ophthalmic use only and must not be taken orally or injected.

Do not use Opatanol if you have a known hypersensitivity to olopatadine hydrochloride or any of the excipients, including benzalkonium chloride.

Opatanol is not intended for the treatment of eye infections or non-allergic conjunctivitis.